If you look at a star that is 14 light yaers away, how long ago did the light you are seeing leave the star

Which two objects have stored energy? 1. a ball rolling on the ground 2. a small rock sitting on top of a big rock 3. a stretched rubber band 4. a stone lying on the ground

Whose atomic theory explains how atoms emit (release) and absorb light

In which part of the eye are eye floaters found? Cornea. Vitreous humor. Retina. Convex lens.

Why does the speed of sound vary depending on the medium through which it travels. in general?

A 500.-kg roller coaster car starts from rest at the top of a 60.0-meter hill. Find its potential energy when it is halfway to the bottom.

A sound wave traveling at STP has a period of. 0023 seconds. The wavelength of this sound is closest to 1) 1.4E5 2) 6.9E-6 3) 0.76m 4) 76m

Static charge develops on a substance as it acquires or loses protons due to friction. a. True b. False

A milk truck carries milk with density 64.6 lb/ft3 in a horizontal cylindrical tank with diameter 12 ft. (a) Find the force exerted by the milk on one end of the tank when the tank is full. (Round your answer to the nearest integer.) lb

Which human activity contributes to air pollution

Cooler stars age much faster than hotter stars true or false