When is the only time that an object has no gravitational potential energy

Suppose you made some beef soup. you want to separate the extra fat from the soup before you eat it. how could you do that?

An alloy is made of a material of specific gravity 7.87 and another material of specific gravity 4.50. The alloy of mass 750g has an apparent weight of 6.6N when totally immersed in a liquid of specific gravity 0.78.

Which of the following is an example of inertia

Kevin draws a figure that has 4 sides all sides have the same length his figure has no right angels what figure does he draw

Why do things become hot or cold? Relate to Thermal Energy and The Law of Conservation of Energy

Explain the difference between work and power.

What happened if a stranger come to you what will you do

Which internal heat source still generates heat within the terrestrial worlds today?

The yellow balls represent neutrons and have a neutral charge.

When an objects total mechanical energy is conserved and it is dropped from rest how does the objects initial potential energy compare with its final kinetic energy?