Consider two samples of gas. sample a has pressure p, temperature t and volume v. sample b has pressure p, temperature t/2 and volume v. gas a has the mass of molecule m, gas b has mass of molecule 4m. what is the number of molecules in sample b in terms of number of molecules of sample a, n? (18.5)

What happens to light waves from a star as the star moves away from earth?

The long handle on a rake is a(n) a. lever b. screw c. wedge d. inclined plane

Samir watches a 100-minute movie on his spaceship. maria's spaceshipe flies in the same direction as samir's spaceship but she observes his move to last 125 minutes and his spaceship to be 40 m long. how long does samir observe his own spaceship to be? according to an observer on earth, planet x is stationary. maria and samir depart earth on their spaceships at the same time, each flying at 0.5c. maria flies toward planet x and samir flies in the opposite direction. according to maria, her voyage to planet x takes 9 years. how many years does marias voyage take according to samir?