Which two gases in the atmosphere are essential to life on Earth? *

Nitrogen and Helium
Oxygen and Carbon Dioxide
Neon and Argon
Hydrogen and Helium

Distinguish between a transverse wave and a longitudinal wave.

How would a small bar magnet be oriented when placed at position x?

Awheel of mass 48 kg is lifted to a height of 0.8 m. how much gravitational potential energy is added to the wheel? acceleration due to gravity is g = 9.8 m/s2. a. 30.4 j b. 3.1 j c. 297.9 j d. 11,321 j