Total # Posts: 12
a small cork with a excess charge of +6.0 μC (1 μc = 10^-6 C) is placed 0.12 m from another cork, which carries a charge of -4.3 μC.... how many electrons are on the negative cork?
November 15, 2009
A glass rod rubbed against your hair gains a charge of -14.0 nC. What is the electric force between the balloon and your hair when the two are separated by a distance of 7.1 cm? (Assume that the charges are located at a point.)
November 9, 2009
Although it can't sustain its top speed for more than 8.65 sec, the cheetah can run a distance of 274 m during that time. If a cheetah with a mass of 50.0 kg is moving north at its top speed. what is its momentum?
November 4, 2009
A 0.190 kg piece of copper is heated and fashioned into a bracelet. The amount of energy transferred as heat to the copper is 6.62 x 10^4 J. If the specific heat of copper is 387 J/kg x °C, what is the change in temp of the copper?
November 2, 2009