A particle moving along a straight line can have non-zero acceleration even when its speed is zero (for instance, a ball in free fall at the top of its path). Can a particle moving in a circle have non-zero centripetal acceleration when its speed is zero? If so, give an example. If not, why not?

According to the tide table below what time of day will the highest tide occur?

Aforce of 200 n is applied to an input piston of cross-sectional area 2 sq. cm pushing it downward 2.8 cm. how far does the output piston of cross-sectional area 12 sq. cm move upward? show all work.

Choose the most likely outcome of this scenario: jen decided to go bike riding without a helmet. while no one is around during her ride, she is thrown from her bike when her wheel goes into a pothole. she is not injured, but she is terrified to get back on her bike. what happens next? a. her physical health is affected even though she wasn't hurt. b. her mental and emotional health are affected because she is afraid to get back on her bike. c. her social health is affected because she is worried her friends saw the fall. d. her overall health is not affected at all by her fall.