Two identical small charged spheres are a certain distance apart, and each initially experiences an electrostatic force of magnitude F due to the other. With time, charge gradually diminishes on both spheres
When each of the spheres has lost half its initial charge, the magnitude of the electrostatic force will be A) 1/16 F
B) 1/8 F
C) 1/4 F
D) 1/2 F
C
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A 5.00-g bullet is fired into a 950-g block of wood suspended as a ballistic pendulum. The combined mass swings up to a height of 8.00 cm. What was the kinetic energy of the bullet immediately before the collision?
a. 1.4E+2 J b. 1.5E+3 kJ c. 3.9E–3 J d. 1.4E+8 J e. 1.5E+2 J
Distinguish between the terms slit width and slit separation
The neutral hydrogen atom consists of
a. one proton and one neutron. b. one proton. c. one proton, one neutron, and one electron. d. one proton and one electron. e. an isotope and an ion.
The only force acting on a 2.0-kg body as it moves along the x axis is given by Fx = (12 ? 2.0x) N, where x is in m. The velocity of the body at x = 2.0 m is 5.5 
m/s. What is the maximum kinetic energy attained by the body while moving in the +x direction?
A. 36 J B. 39 J C. 43 J D. 46 J E. 30 J