How is an experiment is actually conducted

Does the speedometer of a car read average speed or instantaneous speed?

a furnace supplies 28kW of thermal power at 300C to an engine and exhausts waste energy at 20C. At the very best, how much work could we expect to get out of the system per second

you can produce a sound by plucking a string or by blowing in a pipe. how are these two ways different?

If a magnet is cut into unequal size pieces, how many north and south poles will each of the pieces have?

What is the mass of a baseball that has a kinetic energy of 100 j and is traveling at 5 m/s'?

A cannon directed straight upward launches a ball with an initial speed v. The ball reaches a maximum height h in a time t. Then, the same cannon is used to launch a second ball straight upward at a speed 2v.

Does the sun fuse hydrogen into helium or vice versa?

Is it possible to put a distance versus time graph to be universal go mine

On very dry days, when you use a comb or a brush, your hair sometimes stands on the end and maybe even sticks to the comb or brush. Explain why this happens in terms of electric charge.

A large balloon is initially filled to a volume of 1.96 l at 318.44 k and a pressure of 2.89 atm. what volume of gas will the balloon contain at 1.77 atm and 336.33 k?