Which gases in the following list exist as separate atoms: hydrogen, helium, nitrogen, oxygen, neon. Select one:
a. Hydrogen and helium
b. Helium and nitrogen
c. Helium and neon
d. Oxygen and nitrogen

Which of the following is true about the speed of light? it depends on the wavelength.

Problem page a jet airplane reaches 846. km/h on a certain flight. what distance does it cover in 13.0 min? set the math up. but don't do any of it. just leave your answer as a math expression. also, be sure your answer includes all the correct unit symbols.

Organisms that live in the alpine and taiga biomes have developed unique adaptations that aid in their survival. moss campion is one of the plants found in the alpine biome. it has small leaves and a cushion shape that protect it from the wind and freezing temperatures in the alpine. how has the moss campion adapted to enable its survival in the alpine biome? a. waxy needles b. cone-shaped c. thin trunks d. low-growing