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

Why do you get warm when you exercise

The rainbow is a result of a. Diffraction of the light. b. Interference of the light. c. Dispersion of the light.

Who thought the earth was the center of the universe

If a car increases its velocity from 1m/s to 3.6km/hr in 5 seconds what's its acceleration

Explain why your body feels like it is being pushed back when the car starts back up again

Which would react chemically by forming an ionic bond? A. 2 chlorine atoms with 7 valence electrons each B. 1 neon atom with 8 valence electrons and 1 lithium atom with 1 valence electron C.

Which of these are considered an oxidizing mutagenic agent? x-rays benzopyrene gamma rays

5. A B note has a frequency of 493.88 Hz. Calculate its wavelength in meters.

When one of the electrons of a particular atom undergoes a transition to a quantum state of lower energy, it a) collides with another of its electrons b) exchanges quantum states with another of its electrons c) undergoes a transition to a quantum

What's the symbol for an ionized bromine atom?