Two very small charged particles exert an electrostatic force F on each other. If the distance between them is doubled, the force between them is

A. Doubled
B. halved
C. Quadrupled
D. Quartered

Astring that is fixed at both ends has a length of 1.05 m. when the string vibrates at a frequency of 91.0 hz, a standing wave with five loops is formed. (a) what is the wavelength of the waves that travel on the string? (b) what is the speed of the waves? (c) what is the fundamental frequency of the string?

Imagine that someone pushes one marble toward a motionless marble. would there still be action-reaction forces involved in the collision? how might the marbles’ motions be changed? ?

Which of these metals are magnetic?