Consider an acoustic point source of frequency 1kHz that creates a sound level of 110 dB in your ear.
(a) What is the intensity of the sound source in your ear? (1 mark)
(b) By how much do air molecules typically move in your ear as a
Assult
of the sound?
Consult the PHYS-1130 formula sheet for relevant constants. (2 marks)
(b) Assuming that you are 10 m away from the sound source, what is its power? (1
mark)

A2.0 μf capacitor and a 4.0 μf capacitor are connected in series across a 0.827-kv potential. the charged capacitors are then disconnected from the source and connected to each other with terminals of like sign together. find the voltage across each capacitor.

Aparticle's position is given by x = 3.00 - 9.00t + 3t2, in which x is in meters and t is in seconds. (a) what is its velocity at t = 1 s? (b) is it moving in the positive or negative direction of x just then? (c) what is its speed just then? (d) is the speed increasing or decreasing just then? (try answering the next two questions without further calculation.) (e) is there ever an instant when the velocity is zero? if so, give the time t; if not, answer "0". (f) is there a time after t = 3 s when the particle is moving in the negative direction of x? if so, give the time t; if not, answer "0".

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