Given that i0=10−12 watts/meter2, what is the intensity of a sound for which the decibel level of the sound measures 148? round off your answer to three decimal places.

What is the most useful equation for electric power?

How is the ideal mechanical advantage of a wheel and axle calculated?

Dc versus ac problem. suppose your dc power supply is set to 15 v and the vertical setting on the oscilloscope is at 5 v/div. how many divisions will the trace deflect if you connect the output of the power supply to the scope with the a input switch set on dc? how many divisions if the switch is on ac?