What happens when equal forces are exerted in opposite directions
(the same amount of push and
pull)?
A. There is positive net force.
B. There is negative net force.
C. The net force is zero.
D. There is a small net force.

The ph is the a.independent variable b.the dependent variable c.control group

If a star is moving toward earth, it is

Awelder using a tank of volume 7.50×10^-2 m^3 fills it with oxygen (with a molar mass of 32.0 g/mol ) at a gauge pressure of 3.30×10^5 pa and temperature of 37.1 ∘c. the tank has a small leak, and in time some of the oxygen leaks out. on a day when the temperature is 23.1 ∘c, the gauge pressure of the oxygen in the tank is 2.00×10^5 pa . a) find the initial mass of oxygen. b) find the mass of oxygen that has leaked out.