A system of pulleys is used to raise a load of bricks that weighs 1,700 newtons. The force applied to the pulley is 340 newtons. What's the mechanical advantage of this machine?

Magnetic fields interact with each other just like electric fields do. True False

You load an arrow into a bow and pull the bowstring back. 50m. The bow has a spring constant k=2000N/m. What is the potential energy of the bowstring?

A block of mass m is pushed a horizontal distance D from position A to position B, along a horizontal plane with friction coefficient µ. Then the mass is pushed from B to A.

How did the temperature structure of the solar nebula determine planetary composition?

What type of energy dose an earthquake transfer

Why is it important for engineers to design bumper cars safely

What must her minimum speed be just as she leaves the top of the cliff so that she will miss the ledge at the bottom, which is 1.75 m wide and 9.00 m below the top of the cliff?

Which statement describes how light behaves when it strikes a translucent material? A. Light is scattered. B. Light is transmitted. C. Light is reflected. D. Light is absorbed.

A certain gas is present in a 15.0 l cylinder at 2.0 atm pressure. if the pressure is increased to 4.0 atm the volume of the gas decreases to 7.5 l.

Choose all the answers that apply. To qualify as a planet, a celestial object must: have an irregular shape revolve around the sun orbit in a clear area have enough gravity to have a spherical shape have a satellite