Suppose you put in 100 j of work on a lever and get out 93 j of work. what is the efficiency of the lever and how much of the work input is lost as heat in joules?

The Electrons in a beam are moving at 2.7x108 m/s in an electric field of 16000 N/C. What value must the magnetic field have if the electrons pass through the crossed fields undeflected?

If I start with 32g of Iodine-131, how much will I have after 24 days?

Predict the outcome of velocity & acceleration being in the same direction or opposite directions

A net force of 60 N north acts on an object with a mass of 30 kg. Use Newton's second law of motion to calculate the amount of acceleration the object will experience.

A juggler throws a bowling pin straight up with an initial speed of 8.20 m/s. How much time elapses until the bowling pin returns to the juggler's hand?

Sara tells Michael she is 160 centimeters tall, while Michael says

Express 9.39 x 109 seconds in terms of days

What is the energy equivalent of 5.0 kg of mass? be sure to show all work to support your answer?

An ant carries food at a speed of 1 cm/s. How long will it take the ant to carry a cookie crumb from the kitchen table to the ant hill, a distance of 50 m? Express your answer in seconds, minutes and hours.

What must you know in order to determine the gravitational force between two objects?