A sphere has a charge of -6.40 x 10-7 coulomb. Approximately how many electrons must be removed to make the sphere neutral? a. 2.50 x 10-13 c. 4.00 x 1012
b. 1.60 x 1012 d. 7.03 x 1024

If a 2 ounce coin is dropped from the top of the washington monument and has a final velocity of 300 mph (miles per hour) when it hits the ground, how much kinetic energy will it have at that time?