The sound level produced by one singer is
80.2 dB.
What would be the sound level produced
by a chorus of 19 such singers (all singing at
the same intensity at approximately the same
distance as the original singer)?
Answer in units of dB.

Acar accelerates from 5.0 m/s to to 11 m/s at a rate of 3.0 m/s^2. how far does it travel while accelerating? 20m 117m 43m 16m

2kg of refrigerant 134a undergoes a polytropic process in a piston-cylinder assembly from an initial state of saturated vapor at 2 bar to a final state of 12 bar, 80 degree c. a)determine the work for the process in kj. b)sketch the process on a p-v diagram.

Acamcorder has a power rating of 20 watts. if the output voltage from its battery is 9 volts, what current does it use?