A modern home uses approximately 250 kWh per year to heat each square meter of floor space. Suppose a 4,300-square-meter house draws electricity
from a coal-burning power plant. How much carbon dioxide is released into the
atmosphere as a result of this home's heating needs?​

Arailroad car collides with and sticks to an identical railroad car that is initially at rest. after the collision, the total kinetic energy of the two cars is a) the same as before. b) half as much as before. c) one third as much as before. d) one fourth as much as before. e) twice as much as before.