The Doppler effect is the change in sound caused by the motion of the sound source, motion of the listener, or both. pitch
frequency
amplitude
speed

In a system, when potential energy decreases, then entropy also decreases. true false

Which of the following are guidelines to follow for obtaining accurate observations

Acentrifuge in a medical laboratory rotates at an angular speed of 3,700 rev/min. when switched off, it rotates through 54.0 revolutions before coming to rest. find the constant angular acceleration (in rad/s2) of the centrifuge. your response is within 10% of the correct value. this may be due to roundoff error, or you could have a mistake in your calculation. carry out all intermediate results to at least four-digit accuracy to minimize roundoff error. rad/s2