Which of the following is NOT a way that machines provide a mechanical advantage?

a. change direction

b. change distance

c. change power

d. change force

A pulley of diameter 49.0 in revolves at 1860 rpm. What is the diameter of a second pulley, in inches, if it rotates at 620 rpm?

What is missing from the co-accretion theory of lunar formation?

In order that a train stop safely it'll always pass a signal showing yellow light

Which statement describes how echolocation and ultrasound imaging are the same? A. They both use the absorption of sound waves. B. They both use the diffraction of sound waves. C. They both use the reflection of sound waves. D.

The diagram shows the directions of the earth's rotation and the moon's orbit around the earth. Which of these phenomena occurs on earth because of this?

If there is a current of 15A in a circuit for 5 minutes, what quantity of electric charge flow through the circuit?

Which universal force acts on protons and neutrons in an atom's nucleus?

How many turns are in the secondary coil of a step up transformer that increases voltage from 30 V to 150 V and has seven turns in the primary coil?

What is a nuclear bulge? a) The bulging corner of a spiral galaxy consisting of gas in the shape of a spiral sphere that circles a galaxy b) The bulging center of a spiral galaxy consisting of debris in the shape of a flattened sphere that circles a

Your friend of mass 50 kg can just barely float in fresh water. Calculate her approximate volume.