Can a simple machine's efficiency ever be greater than 100%?

Explain your answer.

Which is the best procedure to make a permanent magnet

Predict whether an element with a valence of 8 is most likely to form ionic bonds covalent bonds or no chemical bonds with other Atoms. explain

The current in a long solenoid of radius 6 cm and 17 turns/cm is varied with time at a rate of 5 A/s. A circular loop of wire of radius 8 cm and resistance 4 Ω surrounds the solenoid. Find the electrical current induced in the loop (in µA).

All mixtures can be seperated by physical process true false

Resistance of a conductor is directly proportional to length. a. True b. False

A farmer had 15 sheep, and all but 8 died. How many are left?

While playing with her 5 year old cousin, a Physics 135 student pushed him forward on his scooter. She pushes with a force of 50 Newtons for 3.5 seconds. If the boy and the scooter together have a mass of 30 kg, what is their final velocity? a. 2.

3. A 120.0 V generator supplies 3.0 kw of power. How much current ca the generator deliver?

An apple drops from a tree and hits the ground in 1.5s what is its speed just before it hits the ground?

Sound travels slow in cold air. Why does the speed of sound depend on air temperature?