For a particular process q=-17 kJ and w=21 kJ. The following statements are true:
(a) Heat flows from the system to the surroundings
(d) The process is exothermic
E=q+w, where q is the amount of heat flowing into or out of the system, is the first law of thermodynamics.
Heat enters the system when q is positive, and heat exits the system when q is negative.
Workflow into or out of the system,
Work is done on the system when w is positive, and the system performs work when w is negative.
E is the system's overall internal energy change.
Q+W = 17 kJ + 21 kJ = + 4 kJ
As a result, the statement in (c) is correct.
Since q is negative in this case at -17 kJ, the process is exothermic, releasing heat from the system generally into the environment.
Thus, the assertion in (d) is true.
As q has a negative value, this indicates that heat is transferred from the system into the environment.
Therefore, the assertion in (a) is true.
Now that w is a positive number, the system is receiving work. Therefore, the assertion in (b) is false.
Since statement b. is untrue, statement e. is also false.
As a result, the assertion in (e) is false.
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The complete question should be:
For a particular process q=-17 kJ and w=21 kJ. Which of the following statements is true?
Heat flows from the system to the surroundings
The system does work on the surroundings
E=+4 KJ
The process is exothermic
None of the above is true
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?
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 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?
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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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
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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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?
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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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
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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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
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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check all that are true statements regarding the anatomy and structure of the sympathetic division.
The statements that are true in regards to the anatomy and structure of the sympathetic division are:
Neuron cell bodies are mainly found in the horns of their spinal cord segments.
The sympathetic trunk ganglia house sympathetic ganglionic neuron cell bodies.
The splanchnic nerves are composed of preganglionic sympathetic axons that did not synapse in a sympathetic trunk ganglion.
The nervous system is a highly complex part of an animal that coordinates its actions and sensory information by sending signals to and from various parts of its body. The nervous system detects environmental changes that affect the body and then collaborates with the endocrine system to respond.
Around 550 to 600 million years ago, wormlike organisms developed nervous tissue. It is divided into two parts in vertebrates: the central nervous system (CNS) and the peripheral nervous system (PNS). The CNS is made up of the brain and the spinal cord.
The presence of a special type of cell known as a neuron defines the nervous system at the cellular level. Neurons have unique structures that allow them to send signals to other cells quickly and precisely. They transmit these signals as electrochemical impulses traveling along thin fibers called axons, which can be directly transmitted to neighboring cells via electrical synapses or cause chemicals called neurotransmitters to be released via chemical synapses.
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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?
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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FILL IN THE BLANK. a molecule with square planar geometry but with six electron regions has ______ lone pairs.
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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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
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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what happens to the sun as it transitions between a main sequence star and a white dwarf?
Simple Answer: The Sun will exhaust the hydrogen fuel in its core and start burning helium.
Explanation:
The sun expands, and it becomes a "Red Giant." During this time, it will engulf the inner planets (Earth, Venus, mercury and mars) After a billion or so years, it would have used all of its remaining helium and would have become have a white dwarf.
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how to find the resistance of a solenoid with diameteter of wire, radius of cylinder, number of turns, and resistivity
The Power through the solenoid sets the max current you want to run through the coil. Voltage/Current=Resistance.
The radius of a cylinder(r) = √(V / π × h), where V is the volume of a cylinder, h is the height of the cylinder, and π(Pi) is a mathematical constant with an approximate value of 3.14.
The number of turns in a solenoid is equal to its length times the magnetic field strength at its center divided by naught times the current in the solenoid . When it comes to the factors on the left-hand side of this expression, we're given all four of them.
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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?
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 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
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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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?
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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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
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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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.
(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 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?
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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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?
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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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:
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 person scuffing her feet on a wool rug on a dry day accumulates a net charge of - 52 μC .A) How many excess electrons does she get, and by how much does her mass increase? ___NB) Change in mass in in kg?
A person scuffing her feet on a wool rug on a dry day accumulates a net charge of - 52 μC. According to the query, the person is walking barefoot on a dry day under a wool rug.
Since the electron affinity of wool is lower than that of the human body, some electrons will be transported from the wool to the wearer's foot.
His feet had acquired a total of -52 micro coulomb of charge.
We are required to determine the overall surplus of excess electrons. A significant quantity of electronic charge is delivered to the body anytime it receives a negative charge.
Consequently, the total charge=number of electrons 1 electronic charge
i.e q=ne
Here, n is the total number of electrons, while e stands for one electron's charge.
we know that [tex]e=-1.602x10^{-19} coulomb[/tex]
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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
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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what is the mass, in grams, of solute in 0.175 l of 3.17 ´ 10-2 m kcl?
0.414 g is the mass, in grams, of solute in 0.175 l of 3.17 ´ 10-2 m kcl .
The mass of the solute can be calculated using the formula mass of solute=volume of solution * concentration of solution.
Identify the overall volume of the solution.
Note the mass concentration.
To find the mass of the solute, multiply the volume by the mass concentration of the solution.
The concentration of the solute is expressed in terms of mass or moles. By multiplying the grammes of solute per gramme of solution by 100, the mass percent of a solution can be computed. of the mass Formula.
A substance that has dissolved in a solution is referred to as a solute. Solvents are substances that help solutes dissolve in solutions. The amount of a solute present per litre of a solution is measured in grammes per litre.
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a solenoid of length has turns of wire, and a radius of . what is the self-inductance of the solenoid?
A solenoid of length has turns of wire and a radius of, the self-inductance of the solenoid will be L = (μN²A) / l
The ability of a coil to withstand changes in current within itself is referred to as its self-inductance. An electromagnetic field is produced whenever there is a change in the current that is flowing through a coil. The strength of this field is related to the rate at which the current in the coil is changing.
Therefore, the coil's inductance is
L = (μN^2A) /l
L represents the inductance of the circuit.N represents the total number of turns on the solenoid.A denotes the cross-sectional area of the object.l denotes the overall length of the solenoid.Additionally, for a given current, it won't change because it depends on the current change rather than the current itself.
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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:
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 man is pushing a box of mass of 80 kg with a force of 180 n, the box accelerates at 1.80 m/s2. what is the magnitude of friction? brainly
The magnitude of the friction force on the box is 36N.
The force applied by the man to push the box of mass 80kg is 180N.
the acceleration of the block is 1.80m/s².
Now, we know,
Acceleration = Net force/mass
A = F/M
Now, the net force will be applied force minus frictional force.
So, if the frictional force is Fr and the applied force is F, then we can write,
a = F-Fr/M
Putting values,
1.80 = 180-Fr/80
Fr = 36N.
So, the frictional force is 36N in magnitude.
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what is the electron cloud? explain how electrons move within the cloud, their energy, and what the outermost electrons are called.
The electron cloud is a model used to describe the behavior of electrons in an atom. Electrons move around the nucleus in a wave-like motion with a certain amount of energy and the outermost electrons are called valence electrons.
The electron cloud is an abstract concept used to describe the behavior of electrons in an atom. It is the region of space where the probability of finding an electron is highest. Electrons move around the nucleus in a cloud-like shape and occupy the space around the nucleus, rather than being confined to a specific orbit.
Electrons move around the nucleus in a wave-like motion with a certain amount of energy. This energy is related to the orbit of the electron, as electrons in higher energy levels are further away from the nucleus than those in lower energy levels. Electrons can move from one energy level to another by emitting or absorbing energy in the form of a photon.
These electrons determine how an atom interacts with other atoms and are responsible for chemical bonding. Valence electrons are the most easily removed from the atom and are important in determining the reactivity of an element.
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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
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 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.
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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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
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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