A person standing a certain distance from an airplane with four equally noisy jet engines is experiencing a sound level of 143 dB . Part A What sound level would this person experience if the captain shut down all but one engine? [Hint: Add intensities, not dB's.]

What is the approximate amplitude of this wave a.10 seconds b.15 centimeters c.30 centimeters d.15 seconds

Asmall 21 kilogram canoe is floating downriver at a speed of 1 m/s. what is the canoe's kinetic energy?

If an astronaut takes an object to the moon the following is true (choose only one). a the mass will change but the weight will be the same. b both the mass and the weight of the object will be the same. c the weight will change but the mass will be the same. d both the mass and the weight of the object will change.