If an electric water heater uses 40 kw of power and runs for 8 hours, what is the total amount of energy used?
a. 5 kilowatt-hours
b. 32 kilowatt-hours
c. 48 kilowatt-hours
d. 320 kilowatt-hours
in a parallel circuit with three bulbs,
a. the bulbs must all be located on the same branch.
b. there is only one path for the current to take.
c. current from each bulb has its own path.
d. the overall resistance increases

i just took the test, the answer is d.  320 kilowatt-hours

The answer is:

D. the sports car, because it has less mass and therefore less inertia

Explanation :  

1)Because the car which has the lower mass will be easy to push.  

2)and when the sports car is less weight than the minivan, then it will be definitely easy to push when both run out of gas.  

-when the force equals the product of mass and acceleration. Therefore, lower the mass, the less the force need to be applied to push.

-when force is directly proportional to the mass of the object.

F = m a

when  F is the  Force

and m is the mass

and a is the  acceleration