A simple pendulum, consisting of a mass on a string of length L, is undergoing small oscillations with amplitude A.
1. The mass is increased by a factor of four. What is true about the period?
Choose the best answer.
a. The period is halved.
b. The period increases by a factor of four.
c. The period remains unchanged.
d. The period doubles.
e. The period decreases by a factor of four.

A. Period is halved

Explanation:

The period of a pendulum swing, T, is given in terms of mass as:

where I = moment of inertia

m = mass of the pendulum

g = acceleration due to gravity

h = Length of string

If the mass is increased by a factor of 4, that means:

M = 4m

(M = new mass)

The new period of the pendulum, , will now be:

Hence, the period is halved.

explanation:

earth's surface is mainly heated by the absorption of infrared radiation from the sun.

evaporation occurs because molecules in liquid water are warmed ( usually by the sun) and vibrate quicker, becoming less dense and rise.

condensation occurs because molecules in water vapor are cooled and therefore vibrate more slowly thus becoming more dense and eventually fall to earth.

lines of equal barometric pressure on a weather map are called: isobars : lines of equal temp on a weather map are called: isotherms.​