Calculate the amount of energy transferred when a 40w light bulb is left on for 30 minutes.

Which of the following is an example of kinetic energy being converted to potential energy? A. On a factory assembly line, boxes slide down a ramp. B. At an ice rink, an ice skater gives another ice skater a gentle push. C.

What is a closed system? A. A system in which no work is done B. A system that can exchange matter with its surroundings C. A system that cannot exchange matter with its surroundings D. A system in which no heat flows

A 15.0 kg penguin waddling east at a velocity of 7.0 m/s collides with a stationary 10.0 kg penguin. After the collision the 15.0 kg penguin is traveling at a velocity of 4.2 m/s 20.0 degrees S of E. a. What is the velocity of the 10.

A spring with spring constant 15.5 N/m hangs from the ceiling. A ball is suspended from the spring and allowed to come to rest. It is then pulled down 7.00 cm and released. The ball makes 37.0 oscillations in 22.0 seconds.

A brave child decides to grab onto an already spinning merry‑go‑round. The child is initially at rest and has a mass of 25.5 kg. The child grabs and clings to a bar that is 1.

Two kids are on a merry-go-round that is turning at a constant rate. ariel is near the outer edge, and bob is closer to the center. ariel has answer (smaller, the same, or greater angular speed?

Visit this website and locate the element mercury, whose chemical symbol is Hg. Click on the square to read about the history, properties, and uses of mercury. Name three uses for mercury.

Ten seconds after starting from rest, a car is moving at 40 m/s. what is the car's acceleration in meters per second per second?

A student builds a simple circuit and a magnet under one of the circuit wires. When the switch is closed charges flow int the circuit and the wire moves

Cite an example in which a force is exerted on an object without doing work on the object