He Big Bang Theory suggests a

The universe began in an instant.

b

The universe was born from clouds of dust and gas.

c

The single point containing the universe exploded and the universe stretched and expanded.

d

Gravity began to form stars and galaxies from clouds of dust and gas.

e

Both A and C.

f

Both B and C.

g

None of the above.

True or false graphs must include scales that increase by the same amount

Most short-period comets do not have randomly oriented orbits because

Two masses are connected by a rope that hangs over a pulley as shown below. the pulley is a uniform cylinder of radius 푅=0.381meters and mass 푀=3.1푘푔. initially 푚"is on the ground and 푚#rests 2.5 meters above the ground. if the system is released, use conservation of energy to determine the speed of 푚#just before it strikes the ground. assume the pulley bearing is frictionless.