Which of the following is an example of a force? A. electrons moving toward a positive charge B. a child kicking a soccer ball C. air pushing against a falling object D. all of the above

Suzanne is making a list of examples of weathering. Which of the following should Suzanne be sure to include? A. a rainstorm washes away soil from a garden. B. a sudden flood transports pebbles into a river. C.

In the 1980's, Congress authorized the U. S. Department of Energy to build the WIPP facility in the Chicuahuan Desert in New Mexico. What is the purpose of WIPP?

The chart shows the voltage of four electric currents. Which is best supported by the data in the chart? Current W flows at a higher rate than Current Z. Current Y flows at a lower rate than Current X.

What is the origin of all stars? a. supernova b. dwarfs c. protostars d. nebulae

State the following: Boyle's law and Charle's law

A gate in an irrigation canal is constructed in the form of a trapezoid 2 m wide at the bottom, 38 m wide at the top, and 2 m high. It is placed vertically in the canal so that the water just covers the gate.

A machine with a mechanical advantage of 10 is used to produce an output force of 250 newtons. What input force is applied to this machine

Why do you float in space

How does physical change affect the identity of a substance

A scientist pours grape juice on three identical white shirts He then uses three different cleaning products on the shirts and measures how clean they get what is the independent variable in this experiment