An object in the sky brightens suddenly, but shows no hydrogen lines in its spectrum. it is most likely a (n) :

Example of a static balance

A bird carries a 25 g oyster to a height of 11m what is the gravitational potential energy of the oyster

Compare and contrast the geocentric view of the solar system with the heliocentric view of the solar system

Compare the numbers of protons and electrons in a positive ion with the numbers of protons and electrons in a negative ion.

How can you tell that a measurement is a vector?

How many miles away is the sun to the earth?

The density of paper is 1.20 g/cm3. what is the mass of the paper in a notebook that is 76 mm thick, 215.9 mm wide, and 279.4mm long? express your answer in significant digits.

On a frictionless surface, a 32 kg student pushes a 43 kg student. If the 32 kg student slides back at 2.4 m/s, how fast will the 43 kg student be sliding and in what direction?

The 100 meter dash is a quick and short run requiring explosive speed. on completion of the dash the runners will continue to breathe hard for several seconds to minutes even though they are no longer running.

If the distance between the two mass double what happens to the gravitational force