in the figure, determine the character of the collision. the masses of the blocks, and the velocities before and after are given. the collision is

It is estimated that an asteroid or comet impacts the Earth with sufficient energy to cause mass extinction about once every few hundred million years.

Mass extinction is an event in which a rapid and widespread decrease is happening to the biodiversity on Earth. In it, all or at least 75% of the world's species died at a much faster rate than they are replaced in less than 3 million years.

There are several things that can cause a mass extinction event, ranging from anoxia, climate change, and volcanism, human activity, to an impact caused by another celestial body, such as an asteroid or comet. Each cause has its own probability of happening.

It is most likely that the latest mass extinction, the Cretaceous-Paleogene extinction where most of the dinosaurs went extinct, was caused by a meteoric impact. It happened around 66 million years ago.

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They are little, but they usually need to be charged in to work. Within this tube, the flow of electrons occurs on its own.

The advantages of spontaneity. Instead of racing from one planned process to the next, it can be highly healthy for our mental health to be open to unplanned happenings and give our minds space to think.

People with spontaneous personalities tend to be somewhat unpredictable at work and like to act or say whatever feels right at the time. A stand-up comedian is a great example of someone who always seems to be able to take the punches and handle whatever come their way.

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The the speed of the car is 24m/s.

The radius of curve is, 90

The mass of the car is, 1200 kg

The coefficient of friction between the tires and the road is, 0.70

The acceleration due to gravity is, .9.81

Here, mg is the weight of the car Ftr , is the frictional force,  is the normal force Fn m is the mass of the car.

Fn = mg

V²  = μrg

V = √90 × 0.70 × 9.81 = 24m/s

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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This is typical conduct. The air is dehumidified by turning on the A/C system, which defrosts the windshield. Without it, problems would arise as a result of your breath freezing on the inside of the windshield.

What is an AC system?

Air conditioning (often referred to as AC, A/C or air con) is a system used to cool down the temperature in an inside space by removing the existing heat and moisture from the room. Essentially, they work by taking warm air into a system and dispersing cold air, but there is much more to this process.

The different AC types are as follows: Central Air Conditioner. Ductless Mini-Split.

Central Air Conditioner.

Ductless Mini-Split.

Window Air Conditioner.

Portable Air Conditioner.

Floor Mounted Air Conditioner.

Smart Air Conditioner.

Geothermal Air Conditioning System.

Hybrid / Dual Fuel Air Conditioner.

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The process of building a straightforward direct current (d.c.) electric motor.

It is made out of a rectangular coil of wire positioned on a spindle so that it can move back and forth between the curved poles of a permanent magnet in the shape of a U.

The coil's two ends are soldered to a copper split ring, also known as a commutator, and its two halves, respectively. When two carbon brushes are placed in circuit with a battery and rheostat, they are made to mildly press against the commutator by means of springs, which causes the coil to revolve.

Assume that when the current is turned on for the first time, the coil is in the horizontal position. According to Fleming's left-hand rule, current will travel through the coil in the direction depicted.

Therefore, The process of building a straightforward direct current (d.c.) electric motor.

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The number of forces acting on the trailer is 2.

The number of forces acting on the truck is 2.

The forces on the system are not balanced

The mass of the system is 1,900 kg.

The magnitude of the net force on the system is 520 N.

The magnitude of the system's acceleration is 0.27 m/s².

The speed of the system is decreasing towards to the left.

The number of forces acting on the trailer is calculated as follows;

The number of forces acting on the truck is calculated as follows;

The net force of the system is calculated as follows;

F (net) = 420 N - (600 N + 340 N)

F (net) = - 520 N

The mass of the system = 1300 kg +  600 kg = 1,900 kg

The acceleration of the system is calculated as follows;

F (net) = ma

where;

a = F (net) / m

a = -520 / 1900

a = -0.27 m/s²

Thus, since the acceleration of the system is negative, the speed of the system is decreasing towards to the left.

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The average acceleration of the world class track sprinter is 3.66 m/s².

Initial distance = h₀ = 0 m

Final Distance = h = 19 m

Initial speed = u = 0 m/s

Final speed = v = 11.8 m/s

We use the kinematic equation of motion, to calculate the average acceleration;

= v² = u² + 2a ( h - h₀)

= a = v² - u² / 2  ( h - h₀)

= a = 11.8² - 0² / 2  ( 19 - 0 )

= a = 3.66 m/s²

Thus, the average acceleration of the sprinter is 3.66 m/s².

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The complete question:

a graph of v(t) is shown for a world-class track sprinter in a 100-m race. (see figure below). It can reach a top speed (of about 11.8 m/s ) in the first 19.0 m of a race. what is the average acceleration of this sprinter

A solar cell is charging a battery, here electrical energy is converted into chemical energy.

Solar cells are semiconductor devices that utilize sunlight to generate energy. They go through the same manufacturing and processing steps as computer memory chips. The main component of solar cells is silicon, which absorbs the photons that the sun's beams emit. The method was first identified in 1839.

A photoelectric cell is a type of device whose electrical properties, such as current, voltage, or resistance, change in response to light. The foundation of photovoltaic modules, sometimes referred to as solar panels, are solar cells.

The photovoltaic effect, which underpins solar cell operation, states that when light of a specific wavelength is shone on semiconductors, free electrons are generated.

Here in the case of solar cell for charging the battery electrical energy is converted into chemical energy.

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The result of the calculation is 385500 Pa and 460.5 N. They held that the Force was far too nuanced to be simply divided between light and dark.

They believed that Force-users were not purely good or evil, but rather that they had a role in a wider spectrum.

3.9 cm = 0.039 m, 101.3 kPa = 101300 Pa

The air pressure at the surface, the water density, the gravitational acceleration, and the height difference are all taken into account when determining the pressure at a depth of d = 29 m.

The instrument probe's pressure field is located where:

Therefore, the force applied to the area under pressure would be 385500 Pa.

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While there would be interference, the phase difference between the two sources would fluctuate and charge too quickly for you to see the pattern.

Young's double-slit experiment makes use of two coherent light sources that are spaced closely apart. Only a few orders of magnitude above the wavelength of light are typically employed. Young's double-slit experiment, which is illustrated by a figure, contributed to our knowledge of the wave theory of light. Since the pattern is made up of parallel straight-line-shaped fringes rather than the fringes of overlapping circles, Young's interference experiment with slits results in a crisper fringe pattern than with pinholes. Compared to the wider overlap of parallel straight lines, circles have relatively fewer portions of overlap.

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Option-d).  it remains the same because both are at the same temperature. If the temperature does not increase while the ice melts, the internal energy of the ice and water mixture changes.

A temperature is a unit of hotness or coldness that can be described in terms of a variety of arbitrary scales. It also indicates the direction in which heat energy will naturally flow, i.e., from a hotter body to a colder body (one at a lower temperature). Temperature is not the same as the energy of a thermodynamic system; for instance, an iceberg has a considerably higher temperature than a burning match, but it has a far larger total heat energy than a match. As opposed to extensive qualities like mass or volume, which are reliant on the amount of stuff being studied, the temperature is an intensive attribute, just like pressure or density.

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The m" = 0.389 Kg mass must be added to the object to change the period to 2.00 s

By applying the time period formula, it is possible to calculate that 0.389 kg of mass must be added to the item in order to shift the period to 2.00 s.

A mass hung from a spring and weighing 0.500 kg oscillates with a 1.50 s period.

where K is the spring constant and m is the mass.

where K is the spring constant, and m' is the final total mass following the addition. Subtract equation (1) from equation (2).

Now change the above statement with the known terms.

To find the value of m', simplify the statement above.

m' = 0.889 Kg

Now, we can calculate the mass that must be added to the object to make the period 2.00 s:

m" = 0.889 - 0.500

m" = 0.389 Kg

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If there is no net loss of kinetic energy in the system as a result of the collision. This is known as an elastic collision. In elastic collisions, kinetic energy and momentum are both conserved.

There must be a change in velocities since each body's momentum is changing while its mass remains constant. Because of this, in elastic and inelastic collisions, velocity is not conserved.

Only collisions between subatomic particles are truly elastic. There are no real-world instances of collisions that are totally elastic because friction always results in some kinetic energy being lost as heat transfer.

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Answer: (c) inertia

Explanation: Mass is directly proportional to inertia. Mass is not related to velocity, and the gravitational acceleration of all objects a given distance from the same massive body is the same. This is tricky, as the force of gravity (weight) is larger on heavier objects, but one must remember that weight is calculated by multiplying an object's mass by g. Option b is only considering g.

The frequency of the first possible harmonic after the fundamental frequency in the open-closed pipe 428.75 Hz.

Calculation:-

A. L = 80 cm

= 0.8 m

V = 343 m/s ( sound speed in the air )

V1 = n V / 2 L

= 1 X 343 / 2 X 0.8

V1 = 214.375 Hz

B. using the above equation

Vf =  V / 2 L

[tex]Vf\alpha 1 / L[/tex]

so the new frequency is high than the previous or before.

C. Now L = L / 2 = 0.8 / 2

L = 0.4 m

Vn  = n V / 2 L

= 1 X 343 / 2 X 0.4

Vn  = 428.75 Hz

so the new frequency is 428.75 Hz

D. Vn  = n V / 2 L  

L  = L /2

Vn = 2 n V / 2 L  

Vn  = 2 n Vn

n  = 2n

Vn  = n' Vn

even multiples of the fundamental frequency

E. for open-closed pipe

fn  = n V / 4 L

and for an open- open pipe  

Vn = n V / 2 L

n V / 2 L  = n V / 2 L

2 L  = L

L  = L / 2

So half the length of open-open Pipe.

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The magnitude of the force needed to keep the block moving at a constant speed is 60 N.

his is the same as the weight of the block. This is because the only force acting on the block is gravity. As the block is moving at a constant speed, the force of friction is equal to the force of gravity. This means that the magnitude of the force needed to keep the block moving is equal to the weight of the block, which is 60 N. To calculate this, we used the equation F = ma, where F is the force, m is the mass of the block, and a is the acceleration, which is 0 in this case. This gave us the equation F = m x 0, which is simplified to F = 0, meaning the magnitude of the force needed is 0, which is equal to the weight of the block, which is 60 N.

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According to   equations of motion, we get after 8.70 seconds  she running directly east.

These are the three equations:

Given :

v₀ = 2.38 m/s

v = 0 m/s

a = 0.310 sin (-62.0°) m/s²

to find time t :

v = at + v₀

0 m/s = (0.310 sin (-62.0°) m/s²) t + (2.38 m/s)

t = 8.70 s

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As the wavelength of light shrinks, more refraction occurs. Light with shorter wavelengths, like violet and blue, is slowed more and, as a result, bends more than light with longer wavelengths.

The distance between any two identical locations on adjacent waves may always be used to calculate the wavelength. When dealing with a longitudinal wave, the distance between one compression and the next or between one rarefaction and the next is used to calculate the wavelength.

A waveform signal's wavelength is defined as the separation between two identical points (adjacent crests) in adjacent cycles as the signal travels through space or along a wire. This length is often stated in meters (m) and centimeters in wireless systems (cm).

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Answer:

if g=-10m/s² then the normal force is 20N

if g=-9.8m/s² then the normal force is 19.6N

Explanation:

The force due to gravity (or weight) is mass times the acceleration due to gravity.

I am going to define up as positive so gravity will be negative.

On earth the acceleration due to gravity is -9.8m/s²

We sometimes round this to -10m/s² to make the math easier.

I will do it both ways.

so we have a mass of 2kg

2kg(-10m/s²)

so the force due to gravity is -20N

because the block is not falling through the table, the table must be pushing back with the same amount of force, but in the opposite direction so we change the sign.

using -10m/s² for g, we get a normal force of 20N (Newtons)

if we use -9.8m/s², we have 2kg(-9.8m/s²)

and a force due to gravity of -19.6N

and when we flip the sign we get a normal force of 19.6N

Hope this helps!

ATC directs you to hold west on the 10 DME fix west of ICH on v306 at the strut intersection while travelling eastward. The standard turns direct entrance technique is advised.

Timing is initiated for the hold entry over/crossing the fix outbound in the entry. Here's when "over" enters the picture—on the first entry outbound. Timing begins when behind the fix on the outbound leg once the hold has been established. A STAR is an ATC-coded IFR arrival route that was created for use by IFR aircraft arriving at specific airports. The pilot-in-command must immediately contact ATC and obtain a revised clearance if the emergency authority of 14 CFR Section 91.3(b) is used to vary from the terms of an ATC clearance. You should decline the clearance and ask for a modified clearance if you receive ATC instructions that you believe could endanger safety or cause you to break a FAR. Take any quick, logical action necessary to maintain the safety of your aircraft.

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The statement that is true about displacement is that displacement may or may not be equal to the distance travelled.

Displacement can be defined as the shortest distance between the initial and the final position of the body.

Displacement is a vector quantity it has a magnitude as well as direction.

Displacement can be zero, can be negative and it also can be positive.

Displacement may or may not be equal to the distance travelled. Because the object travels in the shortest distance possible then the distance will be equal to the displacement of the object. But if the object take any other path to travel from the initial to final position then that is placement may not be equal to the distance travelled.

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The horizontal velocity of the ball before it reaches the ground, where the initial velocity of 20 m/s from a 60m high tower, is 20m/s

Velocity is the directional speed of an object in motion as an indication of its rate of change in position as observed from a particular frame of reference and as measured by a particular standard of time.

From the question given

Initial horizontal verical velocity (ux) = 20 m/s

height of tower (h) = 60m

Basically, after the ball is thrown, it becomes a projectile. It means that the acceleration along the horizontal direction is ax = 0 m/s² over the whole motion.

Now, let's use the formula

Vx = Ux + ax * t

= 20 + (0 m/s²) * t

Vx = 20 m/s

Therefore, the horizontal velocity of the ball before it reaches the ground is 20 m/s.

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Answer:

Assume that the two planets have the same radius. The escape velocity of planet a(with twice the mass) will be [tex]\sqrt{2}[/tex] times the escape velocity of planet b.

Explanation:

Let [tex]G[/tex] denote the gravitational constant.

Consider a spherical planet of mass [tex]M[/tex] and radius [tex]r[/tex]. If an object of mass [tex]m[/tex] is on the surface of the planet, the gravitational potential energy [tex]\text{GPE}[/tex] of that object will be:

[tex]\displaystyle \text{GPE} = \left(-\frac{G\, M\, m}{r}\right)[/tex].

If this object is moving at a speed of [tex]v[/tex], the kinetic energy [tex]\text{KE}[/tex] of this object will be [tex]\text{KE} = (1/2)\, m\, v^{2}[/tex].

If this object is moving at the escape velocity [tex]v_{e}[/tex] of the planet, the [tex]\text{KE}[/tex] of this object will be equal to the opposite [tex]\text{GPE}[/tex]. In other words:

[tex]\begin{aligned}\frac{1}{2}\, m\, {v_e}^{2} &= \text{KE} \\ &= (-\text{GPE}) \\ &= \frac{G\, M\, m}{r}\end{aligned}[/tex].

Rearrange this equation to find escape velocity [tex]v_{e}[/tex]:

[tex]\begin{aligned}{v_{e}}^{2} &= \frac{2\, G\, M}{r}\end{aligned}[/tex].

[tex]\begin{aligned}{v_{e}} &= \sqrt{\frac{2\, G\, M}{r}}\end{aligned}[/tex].

Assume that the radius [tex]r[/tex] of the planet is constant. Based on this equation, escape velocity [tex]v_{e}[/tex] will be portional to [tex]\sqrt{M}[/tex], the square root of the mass of the planet.

Hence, if the radius of planet a and planet b are equal, the escape velocity of planet a will be [tex]\sqrt{2}[/tex] times the escape velocity of planet b.

The magnitude of the vertical force applied by the support at the right end of the bottom beam is -(F_weight).

To determine the magnitude of the vertical force applied by the support at the right end of the bottom beam, we can use the principle of static equilibrium. This principle states that in a static system (one that is not accelerating), the sum of the forces and the sum of the torques must both be zero.

Since the beam is in static equilibrium, the sum of the forces acting on it must be zero. There are two forces acting on the beam: the weight of the beam, which acts downward, and the force applied by the support at the right end, which acts upward. The magnitude of the vertical force applied by the support can be calculated as follows:

F_support = -F_weight

where F_support is the magnitude of the force applied by the support and F_weight is the magnitude of the weight of the beam.

The weight of the beam is given by the equation:

F_weight = m × g

where m is the mass of the beam and g is the acceleration due to gravity (9.81 m/s²).

To determine the mass of the beam, we need to find the mass of the entire beam and then divide it by 2, since only half of the beam is resting on the bottom beam. The mass of the entire beam can be calculated using the equation:

m = ρ × A × L

where ρ is the density of the metal, A is the cross-sectional area of the beam, and L is the length of the beam.

Plugging the values for m, g, and F_weight into the equation for F_support gives us the following:

F_support = -(m × g) = -(F_weight)

Solving for F_support gives us the magnitude of the vertical force applied by the support at the right end of the bottom beam.

Note that this calculation assumes that the beam is uniform, meaning that its density, cross-sectional area, and length are constant along its entire length. If the beam is not uniform, additional calculations will be needed to determine the force applied by the support.

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Galactic nuclei that are still active as they get older tend to become less active. Imagine that over the course of a few days,

we see an X-ray source whose brightness swings noticeably. The diameter of the X-ray source is only a few light-days.

Previously, the cosmos was considerably denser and its galaxies were far closer to one another, increasing the likelihood of collisions. 5. We see that elliptical galaxies were more prevalent in the past because they are created when two spiral galaxies collide.

The reason a galaxy's core appears brightest is that there are more stars there. There are millions more stars per cubic parsec in the Galactic Bulge than in any other region.

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The focal length of the concave mirror is 26.2 cm.

object distance , u = 16.7 cm

image distance , v = -46.1 cm

Now, let the focal length of the mirror is f

The mirror formula is given by,

1/f = 1/u + 1/v

Putting the values of the given parameters to evaluate the focal length of the concave mirror.

1/f = 1/16.7 - 1/46.1

We solve the above equation and thus the value of the focal length of the concave mirror comes out to be,

f = 26.2 cm

The focal length of the mirror is 26.2 cm

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True, One coulomb is defined as the amount of charge that passes a point in a wire in 1 second when a current of 1 ampere is flowing through the wire.

An electric current is a circulation of charged particles, including electrons or ions, shifting through an electrical conductor or space. Its miles are measured because of the net fee of drift of electric fee through a floor or into a managed extent.

The current is one of the most important and essential elements within electric and electronic technology. The contemporary flowing in a circuit may be utilized in an expansion of ways from generating warmness to inflicting circuits to replace, or information to be saved in an included circuit.

Current is decided by the number of electrons passing through a cross-section of a conductor.

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The distance to the cosmological horizon depends on:

A. The age of the universe.

Distance is the numerical or every so often qualitative size of how some of the distance aside items or factors are. In physics, the distance may check with the physical duration or an estimation primarily based on other criteria.

The space between the two factors in the physical space is the period of an immediate line among them, that's the shortest feasible course.

It reduces the entire or a part of the arena to a small sheet of paper. At the same time of making a map, cartographers have to pay attention to properly constitute the distance between two locations.

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