A loudspeaker on a tall pole broadcasts sound waves equally in all directions. What is the speaker's power output if the sound intensity level is 113 db at a distance of 16 m?

Which magnet will produce the strongest force of attraction when placed beneath this magnet?

A friend tells you a way to estimate how far away a lightning bolt strikes. You count the number of seconds between seeing the flash and hearing the thunderclap. Then you divide that number by five to get a distance in miles.

8. Find the momentum of a photon in eV/c and in Kg. m/s if the wavelength is (a) 400nm; (b) 1 Å = 0.1 nm, (c) 3 cm; and (d) 2 nm.

Explain why the calorimeter must be insulated from its surroundings

How are surface winds formed?

A 40 kg-skier starts at the top of a 12-meter high slope. At the bottom, she is traveling 10 m/s. How much energy does she lose to friction? A. She doesn't lose any because mechanical energy is always conserved. B. 4,704 J C. 2,000 J D. 2,704 J

In a series circuit, loads which have the same voltage dropped across them will have?.

Which of the following describes temperature

Which of the following items are affected the most by the force of gravity? A. A tennis ball B. A golf ball C. A baseball D. A bowling ball

Cooling down after a workout allows the oxygen to continuing moving through the body and keeps the muscles from tightening up to fast