A weightlifter can lift 220lbs. (assume 1kg weighs 2.2lbs) If he lifts the weight 2m above the floor, how much work did he do?

Follow up: if the weightlifter lifts the weight 1.2 seconds, how much power does he generate?

Which of these best describes the difference between energy and power? A) Power and energy have nothing in common B) Energy and power are the exact same thing. C) Energy has a time component while power does not.

Which of the following is the SI unit for volume

Since the moon has less mass than earth, what happens to ojects on the moon

Which substance is a heterogeneous mixture? A. Chicken noodle soup B. A sugar cube C. Pure olive oil D. Liquid dishwashing soap

A car is travelling at 50km/h. After 12 seconds, it is now travelling at 60km/h. What is the car's acceleration

An electric motor rotating a workshop grinding wheel at a rate of 151 rev/min is switched off. Assume constant angular deceleration of magnitude 2.23 rad/s 2. Through how many revolutions does the wheel turn before it finally comes to rest

1. What is the atomic number of an atom? Why is this number important? |

The car travels down the road at 60mph for 1.5 hours. How far does it go?

You are riding in an elevator on the way to the eighteenthfloor of your dormitory. The elevator is accelerating upwardwith a = 1.90 m/s2. Beside you is the boxcontaining your new computer; box and contents have a total mass28.0 kg.

Why is chopping carrots a physical change?