Heat is thermal energy transferred from one object to another because of a difference in
a. mass
c. volume
b. temperature
d. potential energy

Amira pulls a 3 pound wagon 4 feet. how much work has she done?

What is the weight of a feather (mass = 0.0001 kg) that floats through earth's and the moon's atmospheres?

The period of a pendulum varies directly as the square root of the length of the pendulum and inversely as the square root of the acceleration due to gravity. find the period when the length is 144 cm and the acceleration due to gravity is 980 cm per second squared, if the period is 7pi seconds when the length is 289 cm and the acceleration due to gravity is 980 cm per second squared.