When a balloon is rubbed with human hair, the balloon acquires an excess static charge. this implies that some materials

a)
conduct electricity, while others do not.
eliminate

b)
can accept protons more easily than others.

c)
can give up electrons more readily than others.

d)
repel negative objects, and others attract them.

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