Which of the following is a compound machine?

A. ramp

B. bicycle

C. screw

D. knife

How long would it take you to hop 30 meters if you hopped 5 m/s?

Which part of the eye controls whether or not the pupil dilates or constricts? iris retina optic nerve cornea

Serious question ... Smog is a type of air pollution. It is a mixture of fog and smoke or other airborne pollutants such as exhaust fumes. What is a result of smog that effects the quality of life for organisms? A. acid rain B. floods C.

A space with an absolute pressure less than one atmosphere may be considered? A. Low gauge pressure B. A partial vacuum C. Zero gauge pressure D. Sea level pressure

A kid at the junior high cafeteria wants to propel an empty milk carton along a lunch table by hitting it with a 3.0g spit ball. If he wants the speed of the 40g carton just after the spit ball hits it to be 0.30 m/s, at what speed should his 3.

Describe the steps used by conventional sewage treatment plants to break down our sewage into a relatively safe effluent that gets dumped into a river, lake, or ocean.

During melting, the forces of attraction between the molecules A) become weaker. B) remain the same. C) become stronger. D) become stronger and then weaker.

What law states that when matter undergoes a physical or chemical change, no atoms are created or destroyed?

If the moon disapared what affect would this have on earths tides

Newtons first law states that no force is required to maintain motion in a straight line at a constant speed. If newtons first law is true, why must we continue to pedal a bicycle on a level surface to keep moving?