if you just dropped this cylinder without any string, how fast would its center be moving when it had fallen the distance in part a?

Answer:

5.59 m/s2

Explanation:

F = 1900 N

m = 340 kg

F = ma

Therefore, a = 1900/340 = 5.59

Time elapses between when you start shaking the string and when the reflected wave returns to your hand in the time it takes for the reflected wave to return to your hand is 2L/v seconds.

The time it takes for the reflected wave to return to your hand depends on the length of the string and the speed of the wave on the string. Let's assume the speed of the wave on the string is v and the length of the string is L.

When you start shaking the string, the pulse travels along the string and reaches the end, where it reflects back towards your hand. The distance it travels is twice the length of the string (2L), and the time it takes for the pulse to travel this distance is given by:

Time = Distance / Speed

Since the distance is 2L and the speed is v, we have:

Time = 2L / v

Therefore, the time it takes for the reflected wave to return to your hand is 2L/v seconds.

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Answer:

it has to be ''G''

Explanation:

.

Answer:

J

Explanation:

Sexual reproduction includes 2 parents but asexual reproduction only requires 1.

The direction of the polarized light after passing the first and the second filter are the same, however the intensity of the light after passing the first and second polarizer are half and fourth of its original intensity, respectively.

Light polarization is a filter of electromagnetic waves such that it propagates into one transmission axis only.

When light passes through a polarizer, its intensity will decrease by half.

Suppose the intensity of unpolarized light is  I₀,  after passing the first polarizer, its intensity becomes:

I₁ = 1/2 . I₀

After passing the second polarizer, the intensity will further decrease by half, or:

I₂ = 1/2 . I₁

I₂ = 1/2 .1/2 . I₀ = 1/4. I₀

Since both polarizers are vertical filters, then the direction of the polarized light after passing the first and the second filter are the same.

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A reference frame is a perspective from which you observe and measure things. Used to define the movement and position of objects. Two people can have different frames of reference for the same situation. In this case, they observe the movement and position of objects differently.

A reference frame is a perspective from which you observe and measure things. Used to define the movement and position of objects.

Two people can have different frames of reference for the same situation. In this case, they observe the movement and position of objects differently.

Units are a way of expressing measurements. It can consistently describe object velocity, mass, position, etc.

Scientists need to communicate their data clearly. They do this by sharing the units and frame of reference they use to measure.

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Nuclear fusion in the Sun's core releases energy in the form of radiation, which travels through space and reaches Earth, providing light and heat essential for life.

Nuclear fusion occurs in the Sun's core, where extreme temperatures and pressures cause hydrogen atoms to combine and form helium. This process releases a significant amount of energy in the form of light and heat.

The energy released during nuclear fusion travels outward from the Sun's core through various layers, such as the radiative zone and the convective zone.

Upon reaching the Sun's surface, the energy is emitted as electromagnetic radiation, which includes visible light, ultraviolet light, and other forms of radiation.

This radiation travels through space, eventually reaching the Earth's atmosphere.

Some of this radiation is absorbed by Earth's atmosphere, while the rest reaches the surface, providing the heat and light necessary for life to exist.

In summary, nuclear fusion in the Sun's core releases energy in the form of radiation, which travels through space and reaches Earth, providing light and heat essential for life.

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The specific heat of a substance of a container affect the quantity of substances that can be accommodated in the container at a given temperature.

The specific heat capacity of a substance is the quantity of heat required to raise the temperature of a unit mass of the substance.

Mathematically, the formula relating specific heat capacity and heat capacity of a substance is given as;

Q = m x  c  x Δθ

where;

From the formula above we can make mass " m " the subject of the formula;

m = ( Q ) / (  c  x Δθ )

As the specific heat of a substance increases, the smaller the mass of the substance that can be held in a container at equal heat gain and temperature and vice versa.

Thus, the specific heat of a substance affects the performance of a container as it depends the mass or volume of the substance that can be held in a container at a constant heat capacity and temperature.

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Answer:

Constructive interference

Explanation:

Answer:

C. Constructive interference

Explanation:

Process P1 has a higher response ratio of 5 compared to Process P2's response ratio of 4, Process P1 will execute first in the HRNN scheduling algorithm.

In the Highest Response Ratio-Next (HRNN) scheduling algorithm, the process with the highest response ratio is executed first. The response ratio is calculated by dividing the waiting time of a process plus its service time by its service time.

Let's calculate the response ratios for both processes:

For Process P1:

Waiting Time = 20 seconds

Service Time = 5 seconds

Response Ratio = (Waiting Time + Service Time) / Service Time

= (20 + 5) / 5

= 25 / 5

= 5

For Process P2:

Waiting Time = 9 seconds

Service Time = 3 seconds

Response Ratio = (Waiting Time + Service Time) / Service Time

= (9 + 3) / 3

= 12 / 3

= 4

This means that the system prioritizes Process P1 due to its higher response ratio, indicating that it has been waiting longer relative to its service time compared to Process P2.

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Answer:

Its C

Explanation:

The speed of this child from this surface would be 14.69 m / s

We have the formula for energy conservation as:

E - potential = E - kinetic

We have the following details with which we are to solve the problem

weight of child w = 350 N

length of rope L = 7.2m

angle θ = 12 degrees

we would have the solution as

m x 9.8m/s² x (10.2 + 1.79 - 7.2 x cos 12) = 1/2 mv²

we would have to solve out the expression that we have above. Such that :

9.8m * (11.99 - 0.9781) = 1/2 mv²

107.9 m = 1/2 mv²

cancel out m

107.9 = 0.5v²

divide through by 0.5

107.9 / 0.5 = v²

215.8 = v²

v = √215.8

v = 14.69

Hence the speed of the child at the surface of the water would be given as 14.69 m / s

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A student ties a lead cube to an oval-shaped block to prevent it from floating and immerses it in water density as part of a study to identify the sort of wood it is composed of.

The term "density" (also known as "volumetric mass density" or "specific mass") refers to a substance's mass per unit of volume. Although the Latin letter D may also be used, the sign most frequently used for density is (the lower case Greek letter rho).

According to legend, Archimedes shouted "Eureka!" as he rushed through the Sicilian streets. ("I've discovered it!") He had figured out what density was. Everyone has spent a significant amount of time in water during their life. The second thing Archimedes noticed was that he felt lighter floating.

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Answer:

the work done can be positive or negative  

Explanation:

Answer:

1) when an acid and a base react to form water and a salt and involves the combination of H+ ions and OH- ions to generate water

2) sulfur dioxide and nitrogen oxides

3)mixtures of sodium bicarbonate,magnesium hydroxide, calcium carbonate

4)

A) sulfuric acid

B) calcium ammonium nitrate

C) calcimine, kalsomine, calsomine, or lime paint

D) ammonium hydroxide

5)

A) Na2SO4 + H2O

B) NaCl + H2O + CO2

6) I can't find anything to help with the answers

7)

A) Can't find any thing

B) copper oxide

Answer:

1)  10 kg-m/s

2)  2 kg

3)  20 m/s

Explanation:

The momentum of an object can be calculated using the equation:

\(\large\boxed{p=mv}\)

where:

\(\hrulefill\)

For this question we need to find the momentum of a bowling ball whose mass is 4.0 kg is rolling at a rate of 2.5 m/s.

Given values:

Substitute the given values into the momentum formula and solve for p:

\(p=4.0\;\text{kg} \cdot 2.5\;\text{m/s}\)

\(p=10\;\text{kg m/s}\)

Therefore, the momentum of the bowling ball is 10 kg-m/s.

\(\hrulefill\)

For this question we need to find the mass of a skateboard rolling at a velocity of 3.0 m/s with a momentum of 6.0 kg-m/s.

Given values:

As we want to find mass, rearrange the momentum formula to isolate m:

\(\large\boxed{m=\dfrac{p}{v}}\)

Substitute the given values into the formula and solve for m:

\(m=\dfrac{6.0\; \text{kg m/s}}{3.0\; \text{m/s}}\)

\(m=2\;\text{kg}\)

Therefore, the mass of the skateboard is 2 kg.

\(\hrulefill\)

For this question we need to find the velocity of a baseball with a mass of 0.5 kg and a momentum of 10 kg-m/s.

Given values:

As we want to find velocity, rearrange the momentum formula to isolate v:

\(\large\boxed{v=\dfrac{p}{m}}\)

Substitute the given values into the formula and solve for v:

\(v=\dfrac{10\; \text{kg m/s}}{0.5\; \text{kg}}\)

\(v=20\;\text{m/s}\)

Therefore, the velocity of the baseball is 20 m/s.

Answer:

The name of the force is elastic (spring) force

Explanation:

The elastic force which is the restoration force of an elastic (spring like) object that tries to return to its initial non-stretched state built up by the pulling of the bow by the archer (using the muscles) pushes on the arrow which the archer releases the same time he leaves the bow string, and the arrow flies in the direction already pointed by the archer

The arrow ultimately falls down due to gravity forces that acts on all objects within the Earths gravitational field. However due to the speed of constant horizontal speed of the arrow and increasing downward speed of the due to the gravity force, the falling of the arrow looks disappointing.

We can use the equation for impulse, which relates the force and change in momentum of an object:

J = ∆p = p2 - p1

where J is the impulse, ∆p is the change in momentum, and p1 and p2 are the initial and final momenta, respectively.

For part (a), we can use the given values to find the initial momentum component perpendicular to the force:

p1sinθ = (2.05 x 10^29 kg m/s)sin(127°) = -1.945 x 10^29 kg m/s

Since the force is always perpendicular to the momentum component perpendicular to it, the impulse will only affect this component:

J = ∆p = p2sinθ - p1sinθ

We can solve for the final momentum component perpendicular to the force:

p2sinθ = J + p1sinθ = (9.0 x 10^22 N)(6 x 60 x 60 s) + (-1.945 x 10^29 kg m/s) = -1.696 x 10^29 kg m/s

For the parallel component of momentum, we can use the conservation of angular momentum to determine that it remains constant. Since the force is perpendicular to the planet's motion, it does not change the planet's angular momentum.

Therefore, the final momentum of the planet is given by:

p2 = √[(p2sinθ)^2 + (p1cosθ)^2] = √[(-1.696 x 10^29 kg m/s)^2 + (2.05 x 10^29 kg m/s cos(127°))^2] ≈ 2.62 x 10^29 kg m/s

For part (b), we can assume that the force on the planet remains constant over the 6-hour time period. Then, we can use the impulse-momentum equation again to find the change in momentum over this time interval:

J = ∆p = p2 - p1

We know that p1 = 2.05 x 10^29 kg m/s, so we can solve for p2:

p2 = J + p1 = (9.0 x 10^22 N)(6 x 60 x 60 s) + (2.05 x 10^29 kg m/s) ≈ 2.83 x 10^29 kg m/s

Therefore, the magnitude of the planet's momentum after 6 hours is approximately 2.83 x 10^29 kg · m/s.

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As can be shown, mass has no bearing on an object's centripetal acceleration; as a result, the centripetal acceleration is unaffected by changes in mass.

The rate at which velocity changes is known as acceleration. Acceleration typically indicates that the speed was changing, but not necessarily. An item that is moving in a circle while maintaining a constant speed is still accelerating because of direction of its motion is shifting.

An object's velocity may alter depending on whether it is moving faster, slower, or in a different direction. A falling apple, the sun orbiting the earth, or a car stopped at a stop sign are a few instances of acceleration.

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Answer:the magnitude of the hikers resultant displacement

Explanation:

Having students run in place at different speeds to illustrate particle movement in states of matter is an example of kinetic theory of matter.Kinetic theory of matter is the explanation of how particles in matter behave.

The kinetic theory explains that particles in matter are always in constant motion. The movement of these particles depends on the temperature and phase of matter.Particles in a solid state move slower than particles in a liquid state. Also, particles in a liquid state move slower than particles in a gaseous state. The faster the particles are moving, the higher the temperature.This means that having students run in place at different speeds to illustrate particle movement in states of matter is an example of kinetic theory of matter.

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Answer: The red ball has a greater velocity than the purple ball

Explanation:

Given the chart :

Ball : Green - - - Red - - - Yellow - - - Purple

Mass : 0.5 - - - - - - 1.2 - - - - - 0.9 - - - - - - 1.7

The four balls have the same momentum

Momentum = mass × velocity

Since momentum is directly proportional to the product of Mass and velocity, and the balls have the same momentum. Therefore the lower the mass of the ball, the higher or greater it's Velocity.

Because if the balls with lower masses have lower Velocities than balls with higher masses, both balls cannot have the same momentum.

Therefore, the only viable option above is, The red ball has a greater velocity than the purple ball, because the red ball has a lower mass than the purple ball

Answer:

B in edg

Explanation:

7200 joules of heat and light energy was dissipated into the air. But no work was done ... no force moved through no distance.

Answer:

A: 2.8 * 10^(-14) J

Explanation:

Formula to find the energy is;

E = hc/λ

Where;

E is energy of a photon (E)

λ is wavelength of the light

c is speed of light

Thus;

E = (1.99 *10^(-25))/(7 * 10^(-12))

E = 2.8 * 10^(-14) J

Answer:elliptical orbit

Explanation:

         The planets are kept in their orbits by the gravity of the Sun. Since no other force in the Solar System can halt them, they remain in their orbits.

       Planets are kept in their orbits around the Sun by the force of gravity. We are only kept on Earth's surface by gravity. Measureable characteristics of planets include their size, mass, density, and composition. The gravitational attraction of a planet is determined by its mass and size.

      Ironically, just as the Earth's gravity keeps the Moon and satellites in orbit around it, the gravity of the Sun keeps the planets in orbit around it. They are moving quickly enough to consistently "miss" the Sun, which prevents them from simply falling into it.

     Planets tend to resist changes in their direction and rate of motion, like  any objects with mass. The solar system's planets, including Earth, are kept in stable orbits by the combination of inertia—a tendency to resist change—and the sun's gravitational pull.

      Where does gravity on Earth end? The gravitational field of the Earth continues into deep space. As one moves away from the Earth's center, it does, however, start to weaken. The distance between Jackson and Nashville, or around 125 miles above the earth, is roughly where the Shuttle circles!

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The tiny ripples in the background radiation COBE found are due to the quantum fluctuations that occurred during cosmic inflation.

What is COBE?

The Cosmic Background Explorer (COBE) is a satellite that was launched in 1989 to study the cosmic microwave background radiation. It was the first satellite mission dedicated solely to cosmology, and it provided groundbreaking insights into the early universe.

What is the cosmic microwave background radiation?

The cosmic microwave background radiation is a faint glow of electromagnetic radiation that permeates the entire universe. It is thought to be the remnant of the Big Bang, and it has been detected in every direction of the sky.

What are quantum fluctuations?

Quantum fluctuations are tiny variations in the energy density of the early universe. They are a natural consequence of the uncertainty principle in quantum mechanics, and they played a crucial role in the formation of the large-scale structure of the universe.

What is cosmic inflation?

Cosmic inflation is a period of exponential expansion that occurred in the early universe. It is thought to have happened within the first 10^-32 seconds after the Big Bang, and it is responsible for the large-scale homogeneity and isotropy of the universe. Cosmic inflation was proposed in the early 1980s to solve some of the problems with the Big Bang model.

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The hot balloon would move with less supply of energy when surrounded by the red dye in the water  than when surrounded by cool air.

We know that the hot air balloon is the kind of experiment that we can be able to use to demonstrate buoyancy. In this kind of experiment that we are talking about here, it follows that we put the hot air balloon in  the red dye in the water bin with what happens to a hot air balloon surrounded by cool air.

It is know that the density is the ratio of the mas to the volume of the object. The density of the gas in the balloon is quite important here. The gas in the hot air balloon when surrounded by the hot air which has les density then it is going to need less supply of energy to move but more energy would be needed when it surrounded by cool air.

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Answer:

I'm not sure but I think it is electric currents in the outer core

Answer:

refrigerators

door bells

magnetic compass

Answer:

That they must die

Explanation:

Stick = Die