- CONCE UJ puper, solve the following problems.
1. Helium makes up 0.00052% of dry air. About how much helium
would there be in a 10,000 m' volume of dry air?

Complete the statement about memory improvement. ( )involves organizing and breaking down information into easier groups to expand capacity. rehearsal is the verbal repetition of information. these techniques are especially important for the improvement of ( ) memory.

How is zig zagging a form of acceleration?

Contrast the force of gravity between these pairs of objects: 1-kg mass and a 2-kg mass that are 1 m apart; a 1-kg mass and a 2-kg mass that are 2 m apart; and two 2=kg masses that are 1 m apart. i dont understand.