A ball thrown vertically upward takes four seconds to rise from the bottom of its path to its highest point. At what time is its instantaneous speed equal to the magnitude of its average velocity for the entire upward motion from bottom to top

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.)

Frequency of electromagnetic waves that a radio station is assigned is called

How is an electron dot structure used to represent a covalent bond?