a 25 kg bear slides, from rest, 12 m down a lodgepole pine tree, moving with a speed of 5.6 m/s just before hitting the ground. (u) what change occurs in the gravitational potential ener

Answers

Answer 1

The gravitational potential energy of the bear decreases as the bear slides from top to bottom of the pine tree.

Given that,

Mass of the bear = 25 kg

Speed of the bear = 5.6 m/s

Height from which the bear slides = 12 m

Gravitational potential energy depends on the height of the bear. As the bear slides from top to bottom, the height keeps decreasing gradually. The formula for gravitational potential energy is P.E = m* g* h

where, m is the mass of the bear

g is the acceleration due to gravity

h is the height at which the bear stays

From the above relation, it is clear that, potential energy is directly proportional to the height of the object.

Thus, gravitational potential energy of the bear decreases as the bear slides down the pine tree.

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Related Questions

016 (part 1 of 2) 10.0 points
A neutron in a reactor makes an elastic headon collision with the nucleus of an atom initially at rest.
Assume: The mass of the atomic nucleus is
about 11.1 the mass of the neutron.
What fraction of the neutron’s kinetic energy is transferred to the atomic nucleus?
017 (part 2 of 2) 10.0 points
If the initial kinetic energy of the neutron is
4.2 × 10−13 J, find its final kinetic energy.
Answer in units of J.
No Rounding

Answers

The fraction of the neutron's kinetic energy transferred to the atomic nucleus is 0.09

If the initial kinetic energy of the neutron is

4.2 × 10−13 J, its final kinetic energy  will be 3.82 x 10⁻¹³ J

What is kinetic energy?

The kinetic energy of an object is described as the energy that it possesses due to its motion which is also the work needed to accelerate a body of a given mass from rest to its stated velocity.

In elastic head-on collision, the energy of the system and total momentum is conserved.

For the neutron,

m - mass

Vi - initial velocity

Vf - final velocity

For the atom ,

M- mass

Mi - initial velocity

Mf - final velocity

The initial kinetic energy of the neutron is calculated as;

K.Ei = ¹/₂m₁u₁²

The final kinetic energy of the atomic nucleus will be;

K.Ef =  ¹/₂m₂u₂²

K.Ef =  ¹/₂(11.1 m₁)(0.09u₁)²

K.Ef = 0.09 (¹/₂m₁u₁²)

K.Ef = 0.09 (K.Ei)

The fraction of neutron's kinetic energy transferred will be

= 0.09 (K.Ei) / K.Ei

= 0.09

= 9 %

The final kinetic energy of the neutron will be;

K.E.f (neutron) = (1 - 0.09) x (4.2 x 10⁻¹³ J)

K.E.f (neutron) = 3.82 x 10⁻¹³ J

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a volleyball is spiked so that its incoming velocity of 3.74 m/s is changed to an outgoing velocity of -19.7 m/s. the mass of the volleyball is 0.350 kg. what is the magnitude of the impulse that the player applies to the ball?

Answers

The magnitude of an impulse that the player applies is simply the absolute value of this result or 66.57 Ns.

To find the impulse applied to the ball, you can use the impulse-momentum theorem, which states that the impulse applied to an object is equal to the change in momentum of the object. The momentum of an object is equal to its mass times its velocity, so the change in momentum of the ball is equal to the difference between its final momentum and its initial momentum.

Plugging in the values given in the problem, we find that the change in momentum of the ball is equal to (-19.7 m/s) - (3.74 m/s) = -23.44 m/s. The mass of the ball is 0.350 kg, so the impulse applied to the ball is equal to the change in momentum divided by the mass, or (-23.44 m/s) / (0.350 kg) = -66.57 Ns. The magnitude of this impulse is simply the absolute value of this result, or 66.57 Ns.

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the atmosphere, and space. the numbers express units, in relative terms, of the total incoming solar or outgoing infrared energy how many units of energy are absorbed by earth's surface?

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51 units of energy are absorbed by the earth's surface.

23 of the 51 solar radiation units that the Earth's surface absorbs are utilized to evaporate water, resulting in a 23-unit loss of heat. Convection and conduction, which both result in heat loss at the Earth's surface, employ 7 units each. The leftover units of the initial 51 units of solar energy are released as departing infrared radiation, commonly referred to as terrestrial radiation, from the surface of the Earth. However, instead of radiating 21 units (51-23-7 = 21), Earth emits 117 units away from the surface. This occurs because the Earth only receives solar radiation during the day and emits infrared radiation both during the day and at night. Of these 117 units, only 6 are sent into space past Earth's atmosphere. The 111 more units of infrared light that the Earth's surface released into the atmosphere are absorbed by clouds and greenhouse gases.

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a flooded engine occurs when a. too much fuel and not enough air reaches the engine. b. the engine stalls after you drive though standing water. c. you overfill the gas tank. d. you drive your vehicle into a canal.

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A flooded engine occurs when too much fuel and not enough air reaches the engine. (Option A)

A flooded engine refers to an internal combustion engine that has been fed an excessively rich air-fuel mixture that cannot be ignited. This occurs due to the mixture exceeding the upper explosive limit for the particular fuel. In simple words, a flooded engine simply has too much gas in its cylinders and not enough air, so the spark plugs cannot ignite the fuel-air mix. A flooded engine will not start until the excessively rich mixture has been cleared. The condition also causes an engine to stall from a running state.

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Heeeeelp I am so confuseeeedd

let's just say there's a planet that has 4 satellites

if our Moon rotates from W to E and revolves from W to E around the earth,

then what is the rotating&revolving motions of these 4 moons??

moon 1: rotates from W to E and revolves the opposite way (like Triton)

moon 2: rotates from W to E and revolves from W to E -- the regular moon

moon 3: rotates the opposite way and revolves from W to E

moon 4: rotates the opposite way and revolves the opposite way -- the exact reversed moon


in my memory, moon 3 is making the retrograde motion and moon 2 is making the prograde motion....but suddenly I got so confused about which moon is making the retrograde motion is it moon 1, 3, or 4??? if you figured it out, tell me also about the other moon's motions then I'll pick you as a brainliest

Answers

The Moon and Sun, along with all other celestial objects, appear to travel across the sky from east to west as the Earth spins on its axis from west to east.

What is Directions of Moon and earth?

The Moon, however, orbits Earth in the same direction as our planet rotates when seen from above. So the Moon does move through our sky from west to east, albeit so slowly that we hardly ever observe it.

But during a total solar eclipse, we can observe the Moon's actual motion as it moves from west to east across the face of the Sun.

The Moon's shadow follows it as it moves in the same direction and creates a path across the surface of the Earth. Because it is tidally locked to our planet, the Moon always seems the same to us from here on Earth.

Therefore, The Moon and Sun, along with all other celestial objects, appear to travel across the sky from east to west as the Earth spins on its axis from west to east.

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for what wavelength of light is the scattering only 2.00 % that of light with a visible wavelength of 520 nm ?

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Potentially, optical scattering can be employed to create a solids content assessment instrument that is useful for managing and monitoring tailings ponds.

This bench-scale study looked into the best laser wavelengths for real-time in situ use in oil sands tailings in the visible (405, 520, and 658 nm) and near infrared (980, 1310, and 1550 nm) ranges. In comparison to the visible wavelengths, the near infrared wavelengths generally showed greater sensitivity across the full test range. Additionally, oil sands tailings' remaining bitumen has a tendency to absorb visible wavelengths, interfering with the scattering light signals and resulting in unreliable results. The 1550 nm wavelength in particular demonstrated an almost linear sensitivity of the light scattering with the change in solids concentration due to a sufficiently strong water absorption.

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a skydiver is falling at a constant velocity with a not yet opened parachute identify the forces exerted on the object

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When a skydiver is falling at a constant velocity with a not yet opened parachute, then the main force exerted on the object  gravity.

What is the force exerted on object when skydiver is falling at constant velocity?

When a parachutist leaves the plane with the chute not open, then the main force acting is gravity. As speed through the air increases, then the air resistance also increases.

At 'terminal velocity', which is around 200 km/h, air resistance force balances gravitational force and parachutist stops accelerating and falls at constant velocity. When the parachute is open, then air resistance is greater due to the greater surface area.

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A slender, uniform metal rod of mass M and length lis pivoted without friction about an axis through its midpoint andperpendicular to the rod. A horizontal spring, assumed massless andwith force constant k,is attached to the lower end of the rod, with the other end of thespring attached to a rigid support.
Find the torque tau due to the spring.

Answers

The torque due to the spring is τ = kx × (l/2).

The torque is a measure of the rotational force that can cause an object to rotate about an axis. It is defined as the product of the magnitude of the force and the perpendicular distance from the line of action of the force to the axis of rotation.

The torque due to a spring is the force of the spring multiplied by the distance from the spring's axis of rotation. This torque is also known as spring torque.

The torque due to the spring is given by:

τ = F × r

Where F is the force exerted by the spring and r is the distance between the pivot point and the point at which the spring is attached to the rod.

Since the spring is assumed to be massless and has a force constant k, then the force is given by:

F = kx

Where x is the displacement of the end of the rod to which the spring is attached.

Since the rod is pivoted at its midpoint, then the distance between the pivot point and the point at which the spring is attached is:

r = l/2

Therefore, the torque due to the spring is given by:

τ = kx × (l/2)

Where k is the force constant of the spring, x is the displacement of the end of the rod to which the spring is attached, and l is the length of the rod.

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which term best describes the amount of variation, over or under the required size, permitted on a piece of machined work?

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"frequency" describes the amount of variation, over or under the required size, permitted on a piece of machined work.

When a wave changes media, what happens to its velocity, frequency, and wavelength?

the wave's frequency as well as its wavelength. The wave moves at the same speed no matter what the medium. However, pace varies depending on the medium. The characteristics of the medium affected how fast these waves traveled.

How can variations in amplitude and wavelength affect sound speed?

Note: The speed of sound is unaffected by changes in the wavelength of the sound wave. The amplitude of the sound wave diminishes as the distance from the source grows. The density of the medium affects how quickly sound travels.

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the fewer the periods over which one takes a moving average, the more accurately the resulting forecast mirrors the actual data of the most recent time periods. true false

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True; the fewer the periods over which one takes a moving average, the more accurately the resulting forecast mirrors the actual data of the most recent time periods.

The length of time needed for one full cycle of vibration to pass a specific location is indicated by the letter "T" as a time period. The length of a wave shortens with increasing frequency. "Seconds" is the unit of measure for duration. length of time the period of time that a behavior or condition persists. Time, often known as the period of oscillation, or T, is a unit that can be measured in either seconds or millions of years, depending on the activity or circumstance under consideration. T is equal to 2 or T = 2/. According to the formula f = 1/T = /2, the period, or frequency f, is expressed as an oscillation per second.

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FILL IN THE BLANK. a molecule with square planar geometry but with six electron regions has ______ lone pairs.

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There are 2 lone pairs in a molecule with square planar geometry  with six electron regions.

What is square planar geometry?

The stereochemistry of different molecular compounds is revealed by the Square Planar molecular geometry. This molecule's form is known as square planar when the center atom has four bonds and two lone pairs. The chemical compound xenon tetrafluoride (XeF4) has a square planar structure. Six equally spaced sp3d2 (or d2sp3) hybrid orbitals are placed at 90° angles to form the XeF4 molecule.

The hybrid orbitals have a unique geometry that dates back to their genesis. However, some elements alter the geometry, which in turn changes the molecules' overall shape.

One of the geometries that characterizes a particular atom hybridization is square planar. One core atom is surrounded by bonds to four additional atoms in a planar configuration. This shape produces dsp2 hybridization, which is hybridization.

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the acceleration due to gravity on mars is 3.8 m/s2. how much would an object with a mass of 16 kg weigh on mars?

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The weight of the object with a mass 16Kg would be approximately 60.8 Newtons on mars.

The weight of an object is a measure of the force of gravity acting on that object. On Earth, the acceleration due to gravity is approximately 9.8 m/s^2, so the weight of an object can be calculated using the formula W = mg, where W is the weight of the object, m is the mass of the object, and g is the acceleration due to gravity.

The mass of an object is a measure of the amount of matter it contains and is typically measured in kilograms (kg). The weight of an object is typically measured in Newtons (N). In this case, we are given the mass of an object (16 kg) and the acceleration due to gravity on Mars (3.8 m/s^2). Using the formula W = mg, we can calculate the weight of the object on Mars to be approximately 60.8 N.

This means that the force of gravity acting on the object on Mars would be 60.8 N. The weight of an object can vary depending on the gravitational acceleration of the planet it is on. For example, an object that weighs 100 N on Earth would weigh approximately 38 N on Mars due to the lower acceleration due to gravity on Mars.

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A solid sphere has a radius of 5cm. It is hung from a spring with spring constant 80 N/m and stretches the spring 8cm from its equilibrium position. Find the density of the sphere

Answers

The density of the sphere given that it has a radius of 5 cm is 1.25 g/cm³

How do I determine the density of the sphere?

We'll begin by obtaining the mass of the sphere. This is shown below:

Spring constant (K) = 80 NExtension (e) = 8 cm = 8 / 100 = 0.08 mForce (F) = Ke = 80 × 0.08 = 6.4 NAcceleration due to gravity (g) = 9.8 m/s²Mass (m) = ?

F = mg

Divide both sides by g

m = F / g

m = 6.4 / 9.8

m = 0.653 Kg

m = 0.653 × 1000

m = 653 g

Next, we shall determine the volume of the sphere. Details below:

Radius (r) = 5 cm Pi (π) = 3.14Volume (V) = ?

V = 4/3πr³

V = (4/3) × 3.14 × 5³

V = 523 cm³

Finally, we shall determine the density of the sphere. This is illustrated below:

Mass of sphere = 653 gVolume of sphere = 523 cm³ Density of sphere = ?

Density = mass / volume

Density of sphere = 653 / 523

Density of sphere = 1.25 g/cm³

Thus, the density of the sphere is 1.25 g/cm³

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choose all that apply. matter falling into super-massive black holes in the centers of some galaxies is thought to be the source of:

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Our neighborhood galactic center's black hollow,, is a supermassive black hollow with a mass of approximately 4 million suns, which in all fairness small for a supermassive black hollow.

NASA's Hubble Space Telescope and different telescopes have decided that many galaxies have supermassive black holes at their centere. Once in the black hollow's occasion horizon, rely could be torn aside into its smallest subatomic additives and sooner or later be squeezed into the singularity.

As the singularity accumulates increasingly rely, the scale of the black hollow's occasion horizon will increase proportionally. Quasars are believed to be powered through accretion of cloth into supermassive black holes withinside the nuclei of remote galaxies, making those luminous variations of the overall elegance of items referred to as lively galaxies.rely falling into super-big black holes withinside the facilities of a few galaxies is idea to be the supply.

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a spacex rocket is sometimes used for trips from cape canaveral in florida to the international space station, which is in orbit in the thermosphere. as the rocket moves upwards away from the earth, towards the international space station, it uses a lot of fuel. as the rocket uses fuel, its overall mass decreases. how will this decrease in mass impact the gravitational force between the earth and the rocket?

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The Mass Increase the thrust force and increase the mass of the rocket  between the earth and the rocket .

At full throttle, the net thrust of a rocket motor increases somewhat with altitude because the pressure thrust term increases as atmospheric pressure lowers with height. The rocket accelerates more quickly the faster its fuel is burned. The acceleration increases with decreasing rocket mass.

Similar to the horizontal example, a rocket with more mass will accelerate more slowly, but there is also another result. Because gravity is now forcing the rocket downward rather than up, there is less force pushing the rocket upward as a result.

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a distant observer looks at the surface of a neutron star of 2m and radius of 11 km. how many seconds elapse for this distant observer for every 1 second measured on the surface of the star?

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A distant observer looks at the surface of a neutron star of 2m and radius of 11 km. 16.06 seconds are elapse for this distant observer for every 1 second measured on the surface of the star.

The collapsing core of a large supergiant star with a total mass of between 10 and 25 solar masses—possibly even more if the star was very metal-rich—is what we refer to as a neutron star. Neutron star are the tiniest and densest class of stellar objects currently known, with the exception of black holes and some hypothetical objects (such as white holes, quark stars, and weird stars). Neutron stars are roughly 10 kilometers (6 miles) in diameter and weigh 1.4 solar masses. They are the outcome of a large star's supernova explosion coupled with gravitational collapse, which reduces the core's density to that of atomic nuclei from white dwarf star density. Once formed, they gradually cool down and stop actively producing heat, although they can still evolve further through collision or accretion. Neutrons are subatomic particles with no net electrical charge and a slightly larger mass than protons. According to the majority of basic models for these objects, neutron stars are almost entirely composed of neutrons; under the conditions in a neutron star, protons and electrons combine to create neutrons.

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what happens to the electric potential energy of the positive charge, after the charge is released from rest in the uniform electric field?

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The potential energy decreases, converted to kinetic energy. velocity is increasing and potential energy is decreasing.

What is velocity?

velocity is a term that describes the speed and direction of a point's motion. For example, a circular path's direction is always perpendicular to a lines from the point to the circle's center. A point always travels in a position that is tangential to its path (a radius). An object's ultimate velocity can be expressed as: v = u + at, where v is the final velocity. The ultimate velocity of an boody is equivalent to its original velocity with acceleration directly proportional to the displacement it traveled.

An scalar or a vector, what is velocity?

Speed is a scalar since it simply has a defined magnitude and no defined direction. A vector quantity with both magnitude and direction is velocity.

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what is the pressure p(r)p(r)p(r) of the fluid in the test tube at an arbitrary distance rrr from the axis of rotation?

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The pressure p(r)p(r)p(r) of the fluid in the test tube at an arbitrary distance rrr from the axis of rotation is p(r) = ρω²/2 (r²-ro²) + Po

The following figure shows the test tube filled with water spinning with angular velocity ω

The centripetal force acting on the particle of mass dm at a distance x is, F = dmω²x

The mass dm is given as,

dm = ρdv

= p Adx

Therefore, the force is,

F = ρAω²x dx

The pressure is force per unit area. Therefore, the pressure can be determined as follows:

P(r) = ρω²[tex][\frac{x^{2} }{2} ]^{r} _{r0} +Po[/tex]

Hence, the pressure is,

p(r) = ρω²/2 (r²-ro²) + Po

1 based on or influenced by one's own whims, biases, etc.; capricious. 2 not being absolute; merely having a relative use or importance. 3 tyrannical or dictatorial (of a government, ruler, etc.). 4 (Math) does not represent any particular value.

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a spring is suspended vertically. when a 5:8 kgweight is attached to its lower end, it stretches by 8:1 cm. what is its spring constant

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The value of the spring constant of the spring is found to be 14034N-m.

The spring that is suspended vertically has a weight 5.8kg attached to it. This weight lower down and stretches the spring to a distance 8.11cm.

Now, we know,

The work done by gravity on the mass = Work done by spring.

So, we can write,

Mgx = 1/2Kx²

Mg = 1/2Kx

Where,

M is the mass,

g is the gravitational acceleration,

K is the spring constant,

x is the distance by which the spring stretches.

5.8  x 9.8 = 0.5 x K x  0.0081

K = 14034 N-m.

So, the value of the spring constant is 14.034 N-m.

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FILL IN THE BLANK. in a px orbital, the subscript x denotes the __________ of the electron.

Answers

In a px orbital, the subscript x denotes the axis along which the orbital is aligned of the electron.

'What is atomic orbital?'

The area closest to an atomic nucleus where an electron is most likely to be found is called an atomic orbital. An atom's orbitals can be classified as either s, p, d, or f orbitals. The Px, Py, and Pz orbitals are three of the p orbitals that exist.

The Px, Py, and Pz orbitals all have two lobes, but the Py orbital has two lobes directed along the y-axis, and the Pz orbital has two lobes oriented along the z-axis. This is the main distinction between the three orbitals. Because of how they are oriented in space, the Px Py and Pz orbitals differ from one another.

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nasa's space shuttle used to orbit the earth at about 18,000 mph. if it traveled to the next sun-like star at that speed, the trip would take at least:

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If it traveled to the next sun-like star at that speed, the trip would take at least is 100 millennia.

4.3 light years is the distance to the nearest star, regardless of type.

Let's round up to 25,280,000,000,000 miles.

We obtain around 140444444 hours by dividing by 18000.

roughly 160 000 years.

To Proxia, then. In the triplet of Centauri, a G-type is located roughly at the same distance.

Tau Ceti, however, is the only G-type star in our solar system, which is what you're looking for. 11 light years.

Give or take 400,000 years is a good estimate.

The rate at which an object moves in relation to a reference point is measured as its speed. It is regarded as a magnitude or scalar quantity and has no direction. The formula: can be used to calculate speed.

Speed equals Distance/Time.

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a slingshot fires a pebble from the top of a building at a speed of 14.0 m/s. the building is 31.0 m tall. air resistance is negligible. (a) calculate the speed with which the pebble strikes the ground when the pebble is fired horizontally. (b) calculate the speed with which the pebble strikes the ground when the pebble is fired vertically. (c) calculate the speed with which the pebble strikes the ground when the pebble is fired vertically straight down.

Answers

(A) The pebble's final speed after being fired horizontally is 14 m/s. (b) When launched vertically and straight up, the projectile's terminal velocity is zero. (c) The pebble's terminal speed when fired vertically and directly downward is 28.31 m/s.

What are examples of resistance?

The degree to which an object obstructs or resists an electric current is referred to as resistance. The movement of electrons is referred to as electric current. Consider the scenario of a person navigating a busy market and encountering difficulty moving from one shop to another to better understand resistance.

What results in opposition?

This is due to the fact that resistance is brought about by an interaction between the conductor's atoms and electrons. Longer conductors in this situation will result in more collisions and higher resistance because of this. Inversely correlated to a conductor's cross-sectional area is the conductor's resistance.

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a 4.0-cm tall object is placed 50.0 cm from a diverging lens having a focal length of magnitude 25.0 cm. what are the nature and location of the image? the image is

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A divergent lens with a magnitude 25.0 cm focal length is placed 50.0 cm away from an object that is 4.0 cm tall. 1.3 cm height and 16.7 cm on the same side as the object, a virtual image is created.

Given that the height of object (h) = 4cm

distance of object from diverging lens (u) =  -50cm

focal length of diverging lens (f) = -25cm

The expression for the lens equation is 1/f=1/v+1/u

-1/25 = 1/v+1/50

1/v = 1/50-1/25 = -3/50 Then v= -16.7cm

Determine the height of the image.

image height/object height = -v/u

image height/4 = -(-16.7)/50 =

image height = 1.336cm

The negative sign denotes that the picture will be virtual and will be on the same side of the object.

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what is the speed of an electron that has the same momentum as a photon with a wavelength in vacuum of 488 nm the mass of an electron is 9.11*10^-31 kg

Answers

With a vacuum wavelength of 488 nm and an electron mass of 9.11*10^-31 kg, an electron travelling at 1490.45 m/s has the same momentum as a photon.

The pace at which the distance a moving item travels changes is measured as speed. Since speed is a scalar, it has magnitude but no direction as a unit of measurement. Speed is the rate at which anything moves over a predetermined distance. The elementary electric charge of the electron, sometimes known as the symbol e or, is a negative one. Given that they have no known components and are part of the first generation of lepton particles, electrons are frequently regarded as being elementary particles to its wavelength.

E = mc^2

mc^2 = hc/(lamda)

v = h/m(lamda)

v = 6.626*10^-34/9.11*10^-31*488*10^-9

v = 1490.45 m/s

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one scientific theory is that at the time of the creation of the universe, that for every matter particle created, an equal amount of antimatter was created. t or f

Answers

The scientific theory which says that at the time of creation of universe an equal amount of matter and antimatter was created is still under research. So, it is not possible to say whether the statement is true or false.

In the early universe, there should have been equal amounts of matter and antimatter created by the Big Bang. In any case, today, all that we see from the tiniest life forms on Earth to the biggest heavenly bodies is made up of matter. So, when comparison is drawn there is not that amount of antimatter. The balance must have been shifted by some event. Finding out what happened to the antimatter or why there is an asymmetry between matter and antimatter is one of the most difficult problems in physics.

Despite having opposite properties like electric charge, antimatter particles have the same mass as their matter counterparts. The opposite of the negatively charged electron, for instance, is the positively charged positron. Particles of matter and antimatter are always made in pairs, and if they come in contact with each other, they explode, leaving behind only energy. Particle-antiparticle came into existence just a fraction of seconds after the big bang. It appears that the universe would only contain energy leftover from the creation and destruction of matter and antimatter together.

However, a very small amount of matter, about one particle per billion, was able to survive. Particle physics experiments have demonstrated over the past few decades that the natural laws do not apply equally to matter and antimatter. Physicists are interested in figuring out the reason. Before they decay, researchers have observed millions of spontaneous transformations between particles and their antiparticles.

By studying the subtle differences in the behavior of matter and antimatter particles produced by high-energy proton collisions at the Large Hadron Collider, physicists may be able to determine the nature of this process. Scientists may gain a better understanding of the reasons for the abundance of matter in our universe by studying this imbalance.

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an electrical power station uses 1.13 1014 j of heat input with an efficiency of 35.2%. (a) how much work is done?

Answers

A thermal power plant's efficiency is 35.2%, using 1.13*10¹⁴ j of heat input. The difference between the amount of work that is completed and the amount of waste heat is 0.733*10¹⁴ J or 1.84 g.

Heat input θ[tex]_{i}[/tex]=1.13*10¹⁴ J

η=35.2%

Let's take,

Work done = W

Heat rejected (waste)=θ[tex]_{R}[/tex]

a)η=W/Q[tex]_{i}[/tex]=0.352

W=0.352*1.13*10¹⁴

W=0.397*10¹⁴ J

b) Ist law of thermodynamics

θ[tex]_{i}[/tex]=θ[tex]_{R}[/tex]+W

θ[tex]_{R}[/tex]= θ[tex]_{i}[/tex] -W

θ[tex]_{R}[/tex]=0.733*10¹⁴ J

c)

θ[tex]_{R}[/tex]/W = 0.733*10¹⁴ /0.397*10¹⁴

θ[tex]_{R}[/tex]/W =1.84 g

Efficiency is the ability to carry out tasks or produce desired results without wasting time, resources, money, energy, or other factors. It is the capacity to carry out tasks effectively, efficiently, and without wasting time in a broader sense.

In terms that are more mathematical or scientific, it refers to the degree of performance that requires the fewest inputs to produce the greatest output. It frequently entails the ability of a particular application of effort to create a particular result with a minimal amount or quantity of waste, expense, or superfluous work. Efficiency is used to describe extremely varied inputs and outputs in several disciplines and sectors. "Resource efficiency involves using the Earth's limited resources," the European Commission stated in 2019.

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which of the following is the linear momentum of a moving object? the product of its velocity and its mass the product of its mass times its velocity squared the sum of its mass and its velocity the product of its mass and the distance it has traveled the product of its weight and its speed

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The linear momentum of a body is defined as the product of its mass and its velocity.

Every body moving in a straight line has linear momentum whereas a body which is rotating carries angular momentum. It is a dimensional variable with dimension MLT⁻¹

Linear momentum is the product of mass and velocity. A body with larger mass has a larger linear momentum and vice- versa. The fact that we can stop a moving cycle coming in front of us with our hands but not a truck can be accounted to the greater linear momentum of truck due to its greater mass and high velocity.

Linear momentum of a body is a vector quantity. A vector quantity is the one which has both direction and magnitude hence we can say that linear momentum has the same direction as the velocity. Generally, the linear momentum is denoted by letter 'p'. The SI unit of linear momentum is kgm/s.

The formula for linear momentum is p=mv.

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A woman of ma 54 kg jump off the bow of a 48 kg canoe that i intially at ret. If her velocity i 2 m/ to the right, what i the velocity of the canoe after he jump? Anwer in unit of m/ˆı

Answers

The velocity of canoe will be 27 m/s.

Explain what conservation of momentum is.

According to the rule of conservation of momentum, absent an external force, the combined momentum of two bodies operating upon one another in an isolated system kept static. As a result, momentum cannot be gained or lost.

How to calculate the velocity of the canoe?

Given, mass of the woman, m = 54 kg

mass of canoe, M = 48 kg

velocity of woman, v = 2 m/s

The principle of momentum conservation results in,

pi = pf

 0 = mv - Mu

mv = Mu

 u = mv/M

 u = 54×2/48

 u = 27 m/s

The velocity of canoe will be 27 m/s.

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if the children are separated by a distance of 3.0 m, at what distance, in meters, from the pivot point is the smaller child sitting in order to maintain the balance?

Answers

The young infant must be seated 1.8 meters away from the pivot point in order to balance the distance.

Permit A to be the firstborn.

A second child should be named B.

the following information:

20.0 kg for A's mass

30.0 kg for B's mass

Distance: 3.00 m

Allow n to represent the distance from the pivot.

Note: The distance between the child and the pivot is equal to

As an example:

clockwise moment equals counterclockwise moment

30(3 - n) = 20n

1.8 meters is equal to 90 - 30n n, or 90/50.

Distance is the overall movement of an object without consideration of direction. Regardless of an object's starting or ending position, distance can be defined as the amount of ground it has covered. Distance is a scalar quantity that describes "how much ground an object has covered" while moving. Displacement is a vector number that describes "how far out of place an object is," and it is the object's overall change in position.

Question :

Two children of mass 20.0 kg and 30.0 kg sit balanced on a seesaw with the pivot point located at the center of the seesaw. If the children are separated by a distance of 3.00 m, at what distance from the pivot point is the small child sitting in order to maintain the balance

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points a (at (10,10) m) and b (at (1, 1) m) are in a region where the electric field is uniform and given by n/c. what is the potential difference ?

Answers

-144 V is the calculated value. The difference in charge carriers' energy between two places in a circuit is known as the potential difference.

Voltage is another name for potential difference, which is measured in volts (V). A simple measure of how much potential energy is gained or lost per coulomb when it moves from one location to another is the potential difference or voltage.

A = (2, 3) m = 2 I + 3 j

B = (5, 7) m = 5 I + 7 j

Displacement vector: (3 I + 4 j) m = AB = B - A

E = (4 I + 3 j) N/C for the electric field.

V = - E . AB

V = - (4 I + 3 j) . (3 I + 4 j)

V = - (12 + 12) = - 144 V

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