The force of friction is in the same direction as the object is moving

true

false

What is the correct definition of mechanical energy?

What happens to an egg when you leave it in vinager?

How does the use of simple machines affect force and distance when work is done?

Can the law of momentum conservation ever be violated? (A) No (B) Yes, if there are more than two particles (C) Yes, when the forces between the particles are varying in time (D) Yes, if the two particles stick together after a collision

Two plane mirrors are inclined at an angle of 70. For a ray of light, incident on mirror 1, its angle of reflection from mirror 2 is

A carnot engine rejects 80 mj of energy every hour by transferring heat to areservoir at 10°c. determine the temperature of the high-temperature reservoir and the power produced if the rate of energy addition is 40 kw.

When monochromatic light passes through the interface between two unknown materials at an angle θ where 0∘<θ<90∘, no changes in the direction of propagation of light are observed. What can be said about the two materials? A.

An object has a force of 10 newtons from the right and 17 newtons from the left. Once the object starts moving toward the right, an additional force of 7 newtons is applied from the right.

A basketball player, who weighs 600 newtons, jump 0.5 meters vertically off the floor. Calculate her kinetic energy just before hitting the floor. a) 300J b) 3000J c) 9.81m/s^2 d) 0

What are three physical properties of helium