A 20 kilogram ball rolls down a 10 meter ramp at the rate of 15 meters per second.

A light ray traveling in air enters a second medium and its speed slows to 1.71 * 10^8 meters per second. What is the absolute index of refraction of the second medium? (1) 1.00 (3) 1.75 (2) 0.570 (4) 1.94

How do you determine true displacement value of an object that has moved?

What does a control group show in an experimental investigation? the effects that the scientists are causing by manipulating variables how nature would act without manipulation by the researchers why each part of a system is related to every other

In an analogy between water and electric current, water would correspond to charge. What would correspond to current, I? the flow of water the speed at which water flows the resistance to flow

3. Which form of radiation is used to kill microorganisms? a. microwaves b. visible light c. infrared rays d. ultraviolet rays

Choose The units of 1/4πε0 are: A. N2C2 B. N • m/C C. N2 • m2/C2 D. N • m2/C2 E. m2/C2

What does a fern ultimately depend on as an energy source?

According to the Doppler Effect, which statement is true about a sound as it approaches you and then moves away. A) As the source approaches you, the sound waves are compressed so the pitch of the noise increases.

If you have a beam perfectly balanced on a fulcrum and put a weight at the very end of one side, is there a way to know where you should put a heavier object on the other end?

Most of the Earth's volcanoes occuWhen fossils or minerals form, certain unstable elements are sometimes locked into them.