Aheater is placed in 2kg of water. what temperature raise is produced if the heater is on for 200s?

Describe the path of a ray that approaches a mirror parallel to the principal axis.

An asteroid is discovered in a nearly circular orbit around the sun, with an orbital radius that is 2.47 times earth's. what is the asteroid's orbital period, its "year," in terms of earth years?

The slope of a velocity time graph over any interval of time gives the during that interval