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?

Which of the following is not a characteristic of a sound wave? A) it is longitudinal B) it transfers energy by moving the medium perpedicular to the motion of the wave C) it transfers energy by moving the medium parallel to the motion of the wave

According to Newton's first law, a moving odject acted on by a net force of zero- remains at rest increase its inertia slows at a constant speed moves at constant speed

A woman 5.5 ft walks at a rate of 6 ft/sec towards a street light that is 22 ft above the ground. At what rate is the length of her shadow changing when she is 15 ft from the base of the light?

Which term describes energy stored within a stretched object? A. Thermal energy B. Electrical energy C. Electric energy D. Gravitational potential energy

Why have forest fires in ponderosa pine forests become more damaging to that ecosystem than they were historically?

What does it mean when a plane is perpendicular to the x-axis?

If the weight of an object that is submerged in a fluid is 10 N and the buoyant force on it is 20 N, what will happen to the object?|

A switch in an electric circuit controls the flow of electrons in the circuit. True O False

What are three common forms of work in science

A boat travels north across a river at a velocity of 22 meters/second with respect to the water. The river's velocity is 2.2 meters/second to the east. What is the resultant velocity of the boat, as measured from the land?