How to check if something is glass or plastic?

Meteors start to break up in the stratosphere true or false

Compare and contrast a compound and a mixture

a ball of mass 0.5 kg moving at 10 m/s collides with another ball of equal mass at rest. if the two balls move off together after the impact calculate their common velocity

How do electromagnetic waves form?

Which is a source of AC current? A. a generator B. chemical cells wired in series C. chemical cells wired in parallel

Explain the relationship between motion and frame of reference.

Two students are looking at a brightly lit full Moon, illuminated by the reflected light from the Sun. Consider thefollowing discussion between the two students about what the spectrum of moonlight would look like.

When performing a battery load test, what should the load be set to?

If you push on a wall of a building what will happen

A conductor, with outer surface labelled a, contains a cavity, inner surface b. In this cavity there is a conducting sphere of radius r, and surface c. The sphere carries a charge of 1 C, while the conductor a charge of 2 C.