Rank the ten objects from loudest to softest.

What happens when a roller coaster car moves down from the top of a hill?

VLD [36.1K]

When the roller coaster moves down from the top of the hill, all of its stored potential energy is converted into kinetic energy to move it and when it goes back up the hill it turns kinetic into potential.

3 0

3 years ago

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A solid block of metal is at its melting temperature. it takes 24j to melt 6kg of a metal. what is the latent heat of fusion of

Marina86 [1]

The Latent heat of fusion is also known as the Enthalpy of Fusion. It is a kind pf change in enthalpy.

<h3>Brief explanation of Latent Heat of Fusion? </h3>

The latent heat of fusion, is the change in enthalpy that takes place when energy, typically heat, is provided to a specific quantity of a substance to causes it to change from a solid state to a liquid state at a constant pressure.

For instance, 1 kilogram of ice melts at 0 °C at a variety of pressures, absorbing 333.55 kJ of energy without causing a change in temperature.

The heat of solidification, which occurs when a substance changes from a liquid to a solid, is equal and opposing.

This energy includes the contribution necessary to displace its surroundings against ambient pressure in order to accommodate any corresponding change in volume.

The melting point or the freezing point, depending on the situation, is the temperature at which the phase transition takes place. Conventionally, unless otherwise stated, the pressure is taken to be 1 atm (101.325 kPa).

<h3>Calculation</h3>

The formula of latent heat of fusion is L= q/m

Here q is the heat provided and m is the mass of the object.

So, L = 24j/6kg

L= 4j/kg

So, the latent heat of fusion is 4 j/kg

To know more about latent Heat of Fusion visit:

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8 0

2 years ago

Two tiny beads are 25 cm apart with no other charged objects or fields present. Bead A has a net charge of magnitude 10 nC and b

Alona [7]

Answer:

E. The force on A is exactly equal to the force on B.

Explanation:

The force between two charges is given by

$F=\dfrac{kq_1q_2}{r^2}$

where

$q_1$ = Charge on particle 1

$q_2$ = Charge on particle 2

r = Distance between the charges

k = Coulomb constant = $8.99\times 10^{9}\ Nm^2/C^2$

$F=\dfrac{8.99\times 10^9\times 10\times 10^{-9}\times 1\times 10^{-9}}{(25\times 10^{-2})^2}\\\Rightarrow F=0.0000014384\ N$

This force will be exerted on both the charges equally.

So, The force on A is exactly equal to the force on B

6 0

3 years ago

When you turn off your bedroom lights, the kitchen lights can stay on. This is because your home is wired using which of the fol

FromTheMoon [43]

The answer is b I think

5 0

3 years ago

Give some sources of potential difference (P.D) that you know.

Anna [14]

All type of Batteries
secondary batteries ( Rechargeable battery) example car battery etc . these battery contain Sulphuric acid as there electrolytic
Primary Battery (Non Recharge) example Dry cell , pencil cell . These battery contain chemicals they react when we use the battery and can't be recharged again we need to replace each and every time

4 0

3 years ago