Moving a magnet inside a coil of wire will induce a voltage in the coil. how is the voltage in the coil increased?
a. by moving the coil of wire slowly, and keeping the magnet stationary
b. by holding the magnet absolutely still
c. by moving the magnet inside the coil of wire more slowly
d, by moving the magnet inside the coil of wire more rapidly

The ozone hole appears in antarctica during

The period of a pendulum varies directly as the square root of the length of the pendulum and inversely as the square root of the acceleration due to gravity. find the period when the length is 144 cm and the acceleration due to gravity is 980 cm per second squared, if the period is 7pi seconds when the length is 289 cm and the acceleration due to gravity is 980 cm per second squared.

Asled is being held at rest on a slope that makes an angle θ with the horizontal. after the sled is released, it slidesa distance d1 down the slope and then covers the distance d2 alongthe horizontal terrain before stopping. find the coefficient ofkinetic friction μk between the sled and the ground, assumingthat it is constant throughout the trip. find the coefficient of kinetic frictionμk. express your answer in terms of someor all of the variables d1, d2, and θ.