Materials that are soft and porous will absorb energy causing a decrease in amplitude and energy of the sound. This is called of the sound.

Eddy whose mass is 55kg climbs up the 1.50 meter high stairs in 2s. calculate eddy’s power rating

What distance does a car travel as its speed changes from 0 to 20 m/s in 17 s at constant acceleration?

Aresistor with an unknown resistance is connected in parallel to a 9 ω resistor. when both resistors are connected in parallel to an emf source of 21 v, the current through the unknown resistor is measured with an ammeter to be 4 a. what is the resistance of the unknown resistor? answer in units of ω.