Which of the following statements are part of the explanation why a small increase in mass leads to a large increase in luminosity for stars? select all that apply o faster moving hydrogen atoms hit each other more frequently and are more likely to fuse when they impact each other o greater mass leads to a stronger force of gravity o with a denser core, hydrogen atoms are packed more closely together and thus hit each other more frequently more compression of the core of the star raises its density and temperature. o at a higher temperature, hydrogen atoms are moving faster o stronger self gravity leads to greater compression of the star's core.

The answer is periosteum

Distance covered = speed x timethe distance traveled going against the stream = distance traveled with the stream.therefore it is the speed and the time that are the variables.as he travels the same distance both ways, speed x time is the same for each way.going upstream his speed is 4 kph; going downstream his speed is 6 kph.therefore we have two simultaneous equations: time upstream x 4 = time downstream x 6time upstream + time downstream = 60 minutestherefore we have the equation: time upstream = 6/10 hour, time downstream therefore = 4/10 hour.distance traveled at 4km/hr in 6/10 hour = 24/10 = 2.4km.check: distance traveled at 6km/hr in 4/10 hour = 24/10 = 2.4km.