Suppose a piano tuner hears 3 beats per second when listening to the combined sound from his tuning fork and the piano note being tuned. After slightly tightening the string, he hears 5 beats per second. Should the string be loosened or tightened?

Agas expands from an initial volume of 0.040 m^3 and an initial pressure of 210 kpa to a final volume of 0.065 m^3 while its temperature is kept constant. how much work is done by the system?

Tafari worked one summer on a ship that set weather buoys in the ocean. he watched how one of the buoys moved in the water. describe which parts of the wave would cause the buoy to bob up and down. which wave property determined how fast the buoys bobbed in the water? he observed that when the wind blew harder, the ocean waves were larger, and the buoys moved away from the ship. what effect, if any, did the waves have on how far the buoys moved? explain your answer.

Write down two additional questions about earth's magnetic field that will make your presentation more informative.