Anoisy toy is placed in a glass jar. all the air is then slowly removed from the jar. how does this affect the sound you hear? the sound of the toy increases until it reaches its maximum. the sound of the toy decreases and then stops. the sound of the toy is not affected. the sound of the toy increases and decreases periodically.

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.