All exciting matter and space are referred to as the (?) whats the missing word

A diffraction grating with 1000 lines per mm is used in a spectrometer to measure the wavelengths of light emitted from a gas discharge tube. You measure the diffraction angle to be at 20° for one emission line.

A 700-watt gasoline engine and a 300-watt electric motor both do 3 J of work. Which machine can do the work faster? Explain your answer.

The change in color when acetone is placed on the wing is due to the difference between the indices of refraction of acetone and air. Consider light of some particular color. In acetone, A. The frequency of the light is less than in air. B.

Venus rotates backward and Uranus and Pluto spin about an axis tipped nearly on its side. Based on what you learned about the motion of small bodies in the solar system and the surfaces of the planets, what might be the cause of these strange

An 85 kg object is moving at a constant speed of 15 m/s in a circular path, which has a radius of 20 meters. What centripetal force is exerted on the body? A. 42.50 N B. 765.00 N C. 63.75 N D. 956.25 N

I to fall in love with someone or to at least get a boyfriend

Is rain falling a contact or noncontact force

How does a concave lens differ from a convex lens?

Which object has the greatest gravitational attraction?

Masa samochodu wynosi 2000 kg. Siła parcia wywierana przez cztery koła na powierzchnię szosy wynosi: A. 2000 N B. 20000 N C. 500 N D. 5000 N szybko plis