Which of these is not an example of a physical change?

a. a nail rusting

b. a rock cracking

c. blowing up a balloon

d. stretching a piece of clay

How do you use the lever (simple machines)

A thin, circular hoop with a radius of 0.22 m is hanging from its rim on a nail. When pulled to the side and released, the hoop swings back and forth as a physical pendulum.

In a grocery store you push a 12.5 kg shopping cart

What feature on earth plays a role in the carben cycle similar to that of forests? explain

How can a force change the motion of an object that is already moving?

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.

A flashlight beam strikes the surface of a pane of glass (n = 1.50) at a 61° angle to the normal. what is the angle of refraction?