1 Estimate the speed of sound in solid such as steel (p= 8000kg/m3) which has a Young's modulus of 200X109 N/m 2?

Alarge truck is moving 22.0 m/s. if it’s momentum is 125,000 kg • m/s, what is the trucks mass

Trumpeter a holds a b-flat note on the trumpet for a long time. person c is running towards the trumpeter at a constant velocity. person b is running away from the trumpeter at the same rate. person d is standing still the whole time. which person hears a frequency that is lower than the b-flat?

Clothes dryer uses about 7 amps of current from a 240 volt line. how much power does it use?