Describe the movement of particles at the melting point of a substance

Physics

1 answer:

Rasek [7]2 years ago

5 0

Answer:

Melting occurs when a solid is heated and turns into a liquid. The particles in a solid gain enough energy to overcome the bonding forces holding them firmly in place.

During the melting point, the particles start to move about, staying close to their neighboring particles, then move more freely.

Explanation:

As a substance melts and goes from a solid to a liquid state, the kinetic energy of the molecules increases and moves faster, and separates further away from each other. This is why a liquid can fill the shape of its container, where a soild has a fixed shape.

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A rocket accelerates at 25m/s^2 for 5s before it runs out of fuel and dies. What is the maximum height reached by the rocket?

sineoko [7]

Answer:

1109m

Explanation:

The distance h₁ traveled by the rocket during acceleration:

$h_1=\frac{1}{2}at^2$

The velocity v₁ at this height h₁:

$v_1=at$

When the rocket runs out of fuel, energy is conserved:

$E=\frac{1}{2}mv_1^2+mgh_1=mgh_2$

Solving for h₂:

$h_2=\frac{v_1^2}{2g}+h_1=\frac{(at)^2}{2g}+\frac{1}{2}at^2$

8 0

3 years ago

Learning Goal: To understand the concepts explaining the operation of transformers.

Alex

Answer:

Part a)

ZERO

Part b)

N = 10 turns

Explanation:

Part a)

As we know that transformer is used to change the input voltage into required output voltage

Here this input and output is considered only when it will change with time as the whole concept is based upon Faraday's law where we need to change the flux with time.

So if we have input Source is DC source then output voltage will be zero as there is no flux change

Part b)

As we know by the principle of transformer

$\frac{V_1}{V_2} = \frac{N_1}{N_2}$