A man rides up in an elevator 12 m. He gains 6500 J of gravitational potential energy. What is the man’s mass?

Point charges q1 = 51 µc and q2 = −27 µc are placed 1.0 m apart, with q2 on the right. what is the force (in n) on a third charge q3 = 19 µc placed midway between q1 and q2? (assume the positive direction is to the right. indicate the direction with the sign of your answer.)

Which of the following is not a means to accelerating? question 4 options: a)increase speed b)remain still c)decrease speed d)change direction

Awave has a wavelength of 7 mm and a frequency of 19 hertz. what is its speed?