if you have to apply 40 N of force on a crowbar to lift a rock that weighs 400 N, what is the actual mechanical advantage of the crowbar?

How would your present weight change if Earth had twice the mass that it does now?

A lamp operates at 115 volts with a current of 0.25 ampere. What is the lamp's resistance?

What slows down neutrons?

What statement is NOT true about fossils? a. Fossils give us clues about past climate b. Fossils give us clues about the ground they are formed in c. Fossils give us clues about surface changes d.

The difference in electric potential between a thunder cloud and the ground is 1.53 108 V. Electrons move from the ground which is at a lower potential to the cloud which is at a higher potential.

The friends now feel ready to try a problem. Suppose an Atwood machine has a mass of m1 = 2.5 kg and another mass of m2 = 8.5 kg hanging on opposite sides of the pulley. Assume the pulley is massless and frictionless, and the cord is ideal.

What are the 3 main branches of natural sciences

A girl is walking 2km north them east then south then west whar is her displacement

Find the y-component of this vector:73.3,12.0m. Remember, angles are measured from the + x axis.

A smaller unit of volume than a milliliter would be a microliter. A microliter is one-millionth of a liter. Select one: a. True b. False