If the speed of light in a vacuum is twice that of the speed of light in a given material, what is the index of refraction for that material?

Witch of the following pairs of items will be attracted by one another

What are the damages or effects of sewage dumps into natural water sources?

Sienna made a chart listing the steps that describe how a four-stroke heat engine operates.

What particles make up a plasma of hydrogen?

After the discovery of Uranus, astronomers calculated its orbit and predicted its position in the sky using Kepler's laws of planetary motion, which had been known since the early 17th century.

Light travels at 150000000km from the sun to earth in 8 minutes. What speed is this in Km/s

Electricity problem (coulomb's law)

An observer (O) spots a plane (P) taking off from a local airport and flying at a 29° angle horizontal to her line of sight and located directly above a tower (T). The observer also notices a bird (B) circling directly above her.

In order for convection to occur, you must have

Explain Newton's First Law for the following. If you walk across the room holding a ball, when should you drop it to ensure that it lands on a target? Before, after or when you are directly on the target?