If the pitch of the sound coming out of a speaker increases, which statement is true about the sound wave?
a. the wavelength increases
b. the wavelength decreases
c. the amplitude increases
d. the amplitude decreases

Ais useful when you need a simple machine to you separate two things. a. lever b. screw c. pulley d. wedge

The cerebellum controls? thirst sensations sleep-wake cycles hand-eye coordination heart rate and pulse

Suppose that 27 j of work is needed to stretch a spring from its natural length of 6 m to a length of 9 m. (a) how much work is needed to stretch the spring from 12 m to 14 m? j (b) how far beyond its natural length will a force of 78 n keep the spring stretched?