Ptolemy's model of the universe excluded any reference to heaven. True or false?

When the internal energy of material increase?

How do you calculate velocity?

Explain what happens to the motion of a particle as a wave passes through a medium. How is the motion of the particles like the motion of a mass on a spring

An engine manufacturer makes the claim that the engine they have developed will, on each cycle take 100 J of heat out of boiling water at 100 °C, do mechanical work of 80J, and exhaust 20 J of heat at 10 °C.

A worker does 25 J of work lifting a bucket, then sets the bucket back down in the same place. What is the total net work done on the bucket? a. - 25 J c. 25 J b. 0 J d. 50 J

Steam moves into a cylinder of a steam engine at a constant pressure and does 2.34 J of work on a piston. The diameter of the piston is 3.4 cm and the piston travels 4.6cm. What is the pressure of the steam?

Identify each type of simple machine.

A car's speedometer reads 20 m/s after accelerating, from a standing start, for 25s. What was the magnitude of its acceleration?

What happens to the period of a pendulum and the period of a spring as the amplitude of the oscillation increases? Briefly give an explanation for this relationship.

The element that is most abundant in earth is