Fifteen joules of heat are added to a cylinder with a piston. The system uses 7 joules of energy to raise the piston upward. By how much did the internal energy of the system increase?

When is a model used in science? A) to demonstrate something that would otherwise be too complex to study in real life B) to demonstrate something that is too large or too small in real life C) both of the above

What is a consequence of the second law of thermodynamics? - Activation energy from the environment is required for every energy transfer. - Energy cannot be created or destroyed but it can be transferred.

Why do the passengers on a high-flying airplane not appear weightless, similar to the astronauts on the space station?

During an episode of turbulence in an airplane you feel 170 n heavier than usual. if your mass is 73 kg, what are the magnitude and direction of the airplane's acceleration?

What is speed? time (hours or seconds) distance per time (miles per hour or meters per second) time per distance (hours per mile or seconds per meter) distance (miles or meters)

Why does a metal spoon left on a bowl of hot soup become warm? A) Metal is a conductor. B) Metal is an insulator. C) Metal produces its own heat. D) Metal heats up from magnetism.

What does the heat shock step of the transformation procedure accomplish?

An olympic hurdler accelerates at a rate of 15.5 m/s2. what is the rate in miles/min2?

What is the conservation of energy?

What data are needed to calculate the actual mechanical advantage of a machine