State the principle of conservation of energy

A brick falls from a wall to the ground and it takes 5.67 s to hit the ground. How fan did the brick fall?

Which sentence states Newton's third law?

What layer of the atmosphere returns radio and tv broadcasts back to earth?

A 50.0 kg child stands at the rim of a merry-go-round of radius 1.50 m, rotating with an angular speed of 3.00 rad/s. (a) what is the child's centripetal acceleration? incorrect: your answer is incorrect.

Is it true that 1% of the ocean is discovered?

As a clinical chemist in charge of the testing of blood samples. You are required to mix a solution of sodium chloride with water in the ratio of 2:5.

A positively charged object will attract an object that has A. a negative charge B. a smaller positive charge C. no charge D. a larger positive charge

Whats the usefulness or inconvenience of frictional force by turning a door knob?

How does the direction of acceleration compare with the direction of the net force that produces it

17. Elaine connects an ammeter to a lamp, which is connected to a battery. She records the current. She connects another battery in series to the circuit and records the ammeter reading again. She repeats this step two more times.