Your backpack has a mass of 8 kg. You lift it from the ground to a height of 0.7 m. How much work is done by gravity as you lift the backpack?

The amount of randomness of the atoms in a system is an indication of the

A 1,800kg car has a momentum of - 50,400kgm/s. What is the velocity of the car?

Suppose a wheel with a tire mounted on it is rotating at the constant rate of 2.032.03 times a second. A tack is stuck in the tire at a distance of 0.357 m0.357 m from the rotation axis.

After a long night of cramming for a test, your college roommate hits his head forcefully against the wall of your room in despair. According to Newton 3d Law, as he exerts a force against the wall, there must be an equal and opposite force.

The total amount of energy in a closed system stays the same. t/f

When lava cools, what type of Rock forms?

A uniformly charged conducting sphere of 1.1 m diameter has a surface charge density of 6.2 µC/m2. (a) Find the net charge on the sphere. (b) What is the total electric flux leaving the surface of the sphere?

A blow-dryer and a vacuum cleaner each operate with a voltage of 120 V. The current rating of the blow-dryer is 12 A, while that of the vacuum cleaner is 5.7 A. Determine the power consumed by (a) the blow-dryer and (b) the vacuum cleaner.

4. A 40 kg child and a 30 kg child want to balance themselves on a 4 meter, 50 kilogramn see-saw. Where should the fulcrum be placed?

A 2-kg object is dropped from a height of 1000 m. What is the force of air resistance on the object when it reaches terminal velocity