A ball shot straight up with kinetic energy K0reaches height h.

What height will it reach if the initial kinetic energy is doubled?

Express answer in terms of h.

h1=?

In the problem, it was stated that "a box of mass m slides at a speed v along a horizontal, smooth table", the word "smooth" allow us to assume that the table is frictionless.

Frictionless surface is a surface with little to almost none friction. Frictionless surface alllows the force acting on any object which makes it difficult fo the object to slide or the friction force is almost zero or negligible. In the real world, there is no such a thing called frictionless surface, artificially the smoothest surface will have some friction at some locations.

Friction force is the force that opposes the sliding movement of an object accross another object or surface. The friction force direction will always be the opposite of the motion of an object. Friction force can be divided into 2 kinds:

Static friction is the friction force working on an object when an object is not moving. Static friction keeps an object stay still and resists any force working on an object. However, when the force given to an object increase and the object start to move, static friction is no longer working in the system.

Kinetic friction is the friction force working on an object when an object is moving. Kinetic friction allows an object to slow down when the force is released.

Generally, static friction is greater than kinetic friction.

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Complete Question:

In this problem, we will consider the following situation as depicted in the diagram (Figure 1) : A block of mass m slides at a speed v along a horizontal, smooth table. It next slides down a smooth ramp, descending a height h, and then slides along a horizontal rough floor, stopping eventually. Assume that the block slides slowly enough so that it does not lose contact with the supporting surfaces (table, ramp, or floor).

You will analyze the motion of the block at different moments using the law of conservation of energy.

(Please refer to the diagram below)

Which word in the statement of this problem allows you to assume that the table is frictionless?

Answer:There are total four forces acting on the bicyclist namely, gravitational force, normal force, pushing force and air drag.

The magnitude of net force acting on the bicyclist is 165 N.

The required magnitude of force generated for the pedaling is of 225 N.

Given data:

The mass of bicyclist is, m = 75.0 kg.

The magnitude of acceleration is, .

The magnitude of drag force is, F = 60.0 N.

(1)

There are in total 4 forces acting on the bicyclist:

The gravitational force on the bicyclist, acting vertically downward, of magnitude , where m is the mass of the bicyclist and g is the acceleration due to gravityThe normal force exerted by the floor on the bicyclist and the bike, N, vertically upward, and of same magnitude as the gravitational forceThe force of push F", acting horizontally forward, given by the push exerted by the bicyclist on the pedalsThe air drag, F, of magnitude F = 60.0 N, acting horizontally backward, in the direction opposite to the motion of the bicyclist

(2)

The magnitude of net force acting on the bicyclist is given as,

Thus, the magnitude of net force acting on the bicyclist is 165 N.

(3)

We need to find the forward force of push, F'', which is actually the force generated during pedaling.

Then the expression for the forward pushing force F" is given as,

Thus, we can conclude that the force  generated for the pedaling is of 225 N.

Explanation:

The magnitude of the net force on the bicyclist was 0 N.

Her pedaling is generating  a force of  50 N in opposite of the drag force .

Force is defined in physics as: the push or pull on an object with mass that causes it to change velocity. Force is an external agent that can change the state of rest or motion of a body. It has a magnitude as well as a direction.

A spring balance can be used to calculate force.

As the bicyclist (including the bicycle) is pedaling right with a constant speed, the magnitude of the net force on the bicyclist was = mass × acceleration

= 70 kg × 0 m/s²

= 0 N.

Again her pedaling is generating  a force = drag force = 50 N in opposite of the  drag force . So that, net force on it becomes zero.

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Answer:

100m/s

Explanation:

speed of wave=frequency × wave length

=10 × 10

=100m/s

Answer:

100 m/s

Explanation:

Formula :

Solving using the given values :

The core difference is that heat deals with thermal energy, whereas temperature is more concerned with molecular kinetic energy. Heat is the transfer of thermal energy, whereas temperature is a property the object exhibits.

Answer:

Well AM/Fm is digitally using soundwaves for cars through signal, which we cant hear without one (radio). Concerts are in real life and use wavelegnths that we hear because it bounces off overytihing.

Explanation:

Answer:

B

explanation:

The car is not making a change in speed.

(a) The time taken for the ball to reach the maximum height is 1 second.

(b) The maximum height reached by the ball is 25 m.

The time taken for the ball to reach the maximum height is calculated as follows;

h = -16t²  +  32t  +  9

dh/dt = -32t + 32

dh/dt = v

where;

at maximum height, the final velocity, v = 0

0 = -32t   +  32

32t = 32

t = 32/32

t = 1 s

The maximum height reached by the ball is calculated as follows;

h = -16t²  +  32t  +  9

h = -16(1)²  +  32(1)  +  9

h = 25 m

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Difference in height = 10 - 5 = 5 meters

Kinetic energy = Energy ( 500 N) x height (5 m) = 2,500 N/m  = 2,500 joules

Answer: 2,500 joules

Answer:

Explanation:

P.E. = mgh = 7.7 * 9.81 * 20   j

Answer:

B. Luminosity

Explanation:

The luminosity of a star is a measure of its brightness.

Have a good day and stay safe!

Answer:

asteroid belt

Explanation:

The asteroid belt is a torus-shaped region in the Solar System, located roughly between the orbits of the planets Jupiter and Mars, that is occupied by a great many solid, irregularly shaped bodies, of many sizes but much smaller than planets, called asteroids or minor planets.

The distance that an object with a particular moment of inertia would have to be located from an axis of rotation if it were a point mass can be calculated using the formula I = mr².

Here, I represents the moment of inertia, m represents the mass of the object, and r represents the distance from the axis of rotation. So, if we have an object with a known moment of inertia and mass, we can use this formula to calculate the distance it would need to be located from the axis of rotation if it were a point mass. This distance is important in understanding the object's rotational motion and how it will behave when subjected to different forces and torques.

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A tennis player hits a 56.0 g ball vertically with her racket to warm up for a match.

In this scenario, the tennis player is using the vertical hitting of the ball as a warm-up exercise before the match.

This helps to increase blood flow to the muscles, improve coordination, and prepare the body for the more intense activity of a tennis match.

The mass of the ball, 56.0 g, is given as part of the problem, but there is no information provided about the force or velocity of the hit.

Summary: A tennis player warms up by hitting a 56.0 g ball vertically with her racket, which aids in preparing her body for the match. However, information regarding the force or velocity of the hit is not provided.

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Answer:

When you have two materials with the same index of refraction, it means that if they are touched by a ray of light it won't have a chance, and its form would prevail.

Explanation:

The reason behind this is that in the first place. When light passes through an object of certain refraction it is modified from its natural state, allowing it to change in color to the human eye or many other effects in other perceptive elements. However, when the same light passes through two objects with the same refraction due to their physical characteristics, it doesn't change because once it comes out of the first one it will suffer the same effect from the last one. For it to change the refraction would have to be higher or lower. Then it would be modified. The reason is because the dimensions are not modified. Because at some point the ray of light has to come out of the first one to enter the second one.

Light photons always travel at a constant speed (the speed of light) regardless of their energy, while the velocity of electrons is not constant and can vary with their energy.

Light photons and energetic electrons do not have constant velocities independent of energy. Light photons, which are particles of electromagnetic radiation, travel at a constant speed in a vacuum, which is approximately 299,792 kilometers per second (or about 186,282 miles per second) in a vacuum, denoted as the speed of light (c). This speed is a fundamental constant of nature and remains constant regardless of the energy of the photons. In other words, all photons, regardless of their energy, travel at the same speed in a vacuum.

On the other hand, energetic electrons do not have a constant velocity independent of their energy. According to classical physics, the velocity of an electron can vary depending on its energy. In classical mechanics, the kinetic energy of an object is related to its velocity. However, in the microscopic world of quantum mechanics, the behavior of particles such as electrons is described differently.

In quantum mechanics, the concept of particle velocity becomes less straightforward. Instead of velocity, quantum particles are described by wavefunctions, which represent the probability distribution of finding the particle at a certain location. The wavefunction of an electron evolves over time according to the Schrödinger equation, and it does not directly correspond to a well-defined classical velocity.

However, in certain situations, such as in electron beams or particle accelerators, electrons can be accelerated to high energies. In these cases, the energy of the electrons is related to their speed, but it is not a constant relationship. As the energy of the electrons increases, their speed can also increase, but it is not independent of their energy.

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At the middle of his jump, Ukrainian Sergei Bubka had a mass of 79.8 kJ.

The amount of matter in a particle or object is represented by its mass, which is denoted by the symbol m. In the International System (SI), the kilogram serves as the default unit of mass (kg).

The resistance of the body to acceleration (change of velocity) when a net force is applied is known as inertia, and inertia may be measured experimentally using mass.

h=6.13 meters, mg=9.81 m/s2,

PEg= 4.80 ×10^3J

We will use the equation for gravitational potential energy and rearrange it to solve for mass because the mass is unknown.

PEg = mgh as a result.

PEg/gh = mass

mass = 4.80 ×10^3 / 9.81 x 6.13

79.8 kJ / mass.

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Consider a particle moving to the left with some speed v. If we take leftward to be the negative direction, then the particle's velocity is -v, and it's moving in the negative direction.

Now give the particle a positive acceleration pointing rightward. The particle will eventually slow to a stop before increasing its speed in the positive direction.

So the answer is yes, the direction in which a body is moving can be reversed with constant acceleration.

The X₅ impulsive flare has a total X-ray flux that is four times greater than the X1 long-duration flare.

The total X-ray flux for the X5 impulsive flare is:

5x10-4e⁻² W/m² * 3600 s/hour * 1 hour

= 5.4 J/m²

The total X-ray flux for the X1 long-duration flare is:

1x10⁻⁴ e-t/3 W/m² * 3600 s/hour * 1 hour

= 1.2 J/m²

As you can see, the X₅ impulsive flare has a total X-ray flux that is four times greater than the X1 long-duration flare. Therefore, the X impulsive flare is more likely to signal the beginning of a significant space weather event.

The reason for this is that the X₅ impulsive flare is a much more powerful event. It releases a much larger amount of energy in a much shorter period of time.

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The pull of gravity keeps planets in their orbits around the Sun. Only gravity keeps us on the surface of the Earth. Measurable characteristics of planets include their size, mass, density, and composition.

the solar system's gravitational force brought on by the sun.

The only planet smaller than Mars in the Solar System is Mars, which is the fourth planet from the Sun. Mars bears the name of the Roman god of war in the English language.

Mars, the fourth planet from the Sun, is a cold, arid, dusty place with a tenuous atmosphere. Mars is a dynamic planet as well, with seasons, ice caps, canyons, volcanoes, and indications that it once experienced greater levels of activity.

The Sun, our star, and everything gravitationally attached to it, including the planets Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune; dwarf planets like Pluto; dozens of moons; and millions of asteroids, comets, and meteoroids, make up our solar system.

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Answer:

The gravitational potential energy is 150J

Explanation:

P. E=mgh

=5*10*3

Answer:

A. They can provide an accurate picture of someone’s personality.

C. They can be used to target employee training.

E. They may lead to lower turnover rates.

Explanation:

A. They can provide an accurate picture of someone’s personality and C. They can be used to target employee training, E. They may lead to lower turnover rates.

The phrase "assessment" refers to the broad range of techniques or instruments that educators employ to assess, gauge, and record pupils' academic preparedness, learning progress, skill development, or educational requirements.

Education professionals use a wide range of assessment tools and methods to gauge everything from a four-year-readiness old's for kindergarten to a twelfth-grade student's comprehension of advanced physics.

Despite the fact that assessments are frequently mistaken for traditional tests, particularly the standardized tests created by testing companies and given to large populations of students, educators use a variety of assessment tools and methods.

Therefore, A. They can provide an accurate picture of someone’s personality and C. They can be used to target employee training, E. They may lead to lower turnover rates.

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The diameter should of the double-walled tube be big for an ice box​ is increase the thermal temperature.

Double wall pipes are an important safety tool when storing liquids such as those used in the chemical wastewater food and beverage industries. The majority of jacketed piping applications are for chemical wastewater-contaminated groundwater and chemical process safety.

Tube wall thickness in excess of that required for internal stresses and known loads not only provides a margin of safety against unexpected loads but also increases survival time when corrosion or fatigue mechanisms are in action. increase. Single-layer tubing is lightweight, flexible, and can be installed quickly with less personnel and equipment. The double wall is a smooth inner double wall with a corrugated outer tube.

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To calculate the plate separation for a capacitance of 1580 pF, you need to use the formula C = εA/. Without knowing the area of the plates, we cannot calculate the exact value of d

The required plate separation for a capacitance of 1580 pf can be calculated using the formula for capacitance:

C = ε₀ * A / d where C is the capacitance, ε₀ is the permittivity of free space (8.85  *\(10^{-12 }\) F/m), A is the area of the plates, and d is the plate separation. Rearranging the formula to solve for d, we get:

d = ε₀ * A / C

Plugging in the values for C, ε₀, and the dielectric constant for air (which we will denote as k), we get:

d = (\(8.85 * 10^{-12}\)F/m) * (1.00059) * A / (1580 *\(10^{-12 }\)F)

Simplifying, we get: d = (8.85 * 1.00059 * A) / 1580

Finally, we can solve for d to get the required plate separation:

d = \(5.604 * 10^{-9} * A\)

Without knowing the area of the plates, we cannot calculate the exact value of d. However, this formula shows the relationship between the plate separation, capacitance, and area of the plates.

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Answer:

When a branch of a tree is shaken, some of the fruits may fall down. Why? Solution : The fruits fall down due to inertia of rest.

Answer:

I HOPE IT WILL HELP YOU A LOT....

Answer:

When an unbalanced force acts on a body the side with the greater force's dircetion makes the object move along its direction

Also to find the net force acting on the bofldy you can subtract the two force acting on the body

In case of balanced force the net force will always be 0

Hello :)

Answer:

When an unbalanced force acts on an object, the side with the greater force's direction makes the object move along its direction. For example, when two cars collide on a head-on collision, both vehicles will move in the direction that the vehicle with the greater force is moving in.

The observation of redshift in quasar spectra was a crucial observation in astronomy that helped astronomers in figuring out what quasars really were.

When astronomers observed the spectra of quasars, they found that their spectral lines were significantly redshifted. This observation indicated that quasars were extremely distant objects moving away from us at high speeds. The degree of redshift provided valuable information about the cosmological distance to quasars and the expansion of the universe. By combining the observed redshift with other data and theoretical models, astronomers were able to deduce that quasars were incredibly luminous objects located at cosmological distances. They are now understood to be powered by the accretion of mass onto supermassive black holes at the centers of galaxies.

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If Lina wants to pay off her loan in six months, her payments should be $25.

Simple interest is the amount of money that is being paid to an individual after investing a particular amount of money for a period of time.

The principal amount (P) = $2,500

The simple interest (SI) = $250

Rate (R) = 2%

Time (T) = X

Formula for simple interest = P×T×R/100

make T the subject of formula;

T = SI ×100/P×R

T = 250×100/2,500 2

T = 25000/5000

T = 5 years.

But if Lina wants to pay off her loan in six months, her payments should be calculated as follows:

5 years = $250

0.5 year(6months) = $x

Make $x the subject of formula;

$x = 0.5 × 250/5

$x = 125/5

$x = $25

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Complete question:

Lina wants to remodel her kitchen. Her contractor has quoted her $2,500 for the project. Lina will take out a home improvement loan from her bank. The loan hasa two percent monthly, simple interest rate. Her minimum payments are $250.How long will it take for her to pay off the loan.

If Lina wants to pay the loan off in six months, what should her payments be?Round to the nearest dollar

Answer: I believe it’s location D. Or whichever is the location of slow crystallization.

Explanation: Slow crystallization of magma forms granite. Hope this helps. :)

Answer:

D

Explanation: