Which of these is not a medium through which light can travel?

A. saltwater

B. freshwater

C. clear plastic

D. black quartz

Potential energy is measured in units of

A car traveling west in a straight line on a highway decreases its speed from 30.0 meters per second to 23.0 meters per second in 2.00 seconds. The Cars average acceleration during the time interval. is

Which bike rider has the greatest momentum? F. A 40kg person riding at 45km/h g. A 50 kg person riding at 35 km/h H. A 60 kg person riding at 25 km/h J. A 70 kg person riding at 15 km/h

The plant burns anthracite coal, which has a heat of combustion of 2.65*107J/kg. How much coal does the plant use per day, if it operates continuously? A. The river's temperature is 18.0 ∘C before it reaches the power plant and 18.

What happens during operant conditioning? O A. an individual learns to associate a behavior with its consequence OB. an individual learns to associate two stimuli OC. an individual learns to disassociate himself from a stimulus OD.

If 2 grams of element X combine with 4 grams of element Y to form compound XY, how many grams of element Y would combine with 46 grams of X to form the same compound?

How do positive and negative charges interact with each other?

What is electricity

What happens to the density as one progresses through the layers of the earth from the lithosphere toward the inner core

What is tiny holes on the surface of a plant?