The energy a substance has due to its temperature

Frictional forces acting on an object are often converted into energy, which causes the temperature of the object to rise slightly.

About 3% of the water on earth is freshest. only about 40% of that freshwater is available for human use. why is so much freshwater unavailable for human use?

How many moles of bromine are needed to produce 3.23 moles of potassium bromide