Answer: The correct answer is : The critical density for the universe is approximately 10 ^ -26 kg / m ^ 3 or you can also say 10 hydrogen atoms per cubic meter.
Explanation: This value is given by:
critical density = 3H ^ 2/2 Pi G, where H is the Hubble constant and G is Newton's gravitational constant.
Critical density is the average density of matter necessary for the universe to stop its expansion but after an infinite time.
1. in order to promote the comfort of passengers railroads had to provide equal the separate accommodations for the white and colored races on lines running in the state
2. the civil rights group chose plessy because he could pass for a white man
Radio Waves transmit the least amount of energy.
The correct answer is , Start to fire at a faster rate.
