When a charge is accelerated through a potential difference of 500 V, its kinetic energy increases from 2.0 x 10^ -5 J to 6. 0 x 10^ -5 J. What is the magnitude of the charge?
2 points
a. 4.0 x 10 -8 C
b. 8.0 x 10 -8 C
c. 1. 2 x 10 -7 C
d. 1. 6 x 10 -7 C

How much energy must a refrigerator absorb from 225 g of water so that the temperature of the water will drop from 35°c to 5°c

Hydroelectricity provides about 7 percent of the electricity generated in the united states. (a) explain how a hydroelectric power plant converts energy stored in water into electricity. (b) identify two factors that determine the amount of electricity that can be generated by an individual hydroelectricity power plant. (c) describe the two main types of land-based hydroelectric power plants. (d) describe two economic advantages and two environmental disadvantages of hydroelectricity.

Does the asteroid belt revolve around the sun?