What interaction of sound occurs when you scream into a pillow

As a car drives with its tires rolling freely without any slippage, the type of friction acting between the tires and the road is 100) a) static friction. b) kinetic friction. c) a combination of static and kinetic friction. d) neither static nor kinetic friction, but some other type of friction. e) it is impossible to tell what type of friction acts in this situation.

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

Where is the potential energy throughout the loading, cocking, and releasing of the trebuchet?