The graph below shows the time and position of a motorcycle as it travels through several photogates. Calculate the velocity of the motorcycle as it
moves from gate A to gate B.

A. 1 m/s
B. 3 m/s
C. 4 m/s
D. 2 m/s

Awoman stands a distance d from a loud motor that emits sound uniformly in all directions. the sound intensity at her position is an uncomfortable 2.0×10-3 w/m2. at a distance 2.6 times as far from the motor, what are (a) the sound intensity and (b) the sound intensity level relative to the threshold of hearing?

How are series and parallel circuits simililar? both have multiple paths for electrons to travel. both require resistors in their circuits. both require a switch to complete the circuit. both have at least one path for electrons to travel.

The voltage applied across a given parallel-plate capacitor is doubled. how is the energy stored in the capacitor affected?