What is true when a material changes from a solid to a liquid?

How does the intensity of a 20 decibel sound compare to a 10 decibel sound?

How much heat is required to melt a 30 gram gold block starting at 20 °C? The specific heat of gold is .031 cal/g°C. Its melting point is 1064 °C and its latent heat of melting is 15 cal/g. What is the heat needed to warm it up to the melting point? calories What is the heat needed to melt it? calories

How does the intensity of a 20 decibel sound compare to a 10 decibel sound?

A 1000 kg car accelerates from 0 to 20 m/s in 10 seconds.  Neglecting friction and air resistance, what minimum power is necessary?

In physics, what is the difference between velocity and speed?

Show your work here.

A 1000 kg car accelerates from 0 to 20 m/s in 10 seconds.  Neglecting friction and air resistance, what minimum power is necessary?

In uniform circular motion, the centripetal acceleration vector always points:

The gravitational force between two metal spheres in outer space is 7200 N. How large would the force be if the two spheres were twice as far apart?