Based on the law of conservation of angular momentum, what would happen to a collapsing cloud of gas and dust--isolated in space with no external forces--as its size decreases?

The cloud will spin faster.

Explanation:

According to law of conservation of angular momentum, when the mass size is same, if the size of the collapsing cloud decrease, its it angular velocity should increase.

Angular momentum L =mrω^2

Since L and m is constant , to keep L same. when r is decreased ω must increase. Therefore, the cloud will spin faster.

the current is 0.6

voltage ÷ resistance = current

so 12 ÷ 20 = 0.6

air exerts forces on falling objects near earth’s surface.

explanation:

the term 'free falls' refer to object that are falling towards the earth, in a situation in which gravity is the only force acting on the object.

for an object in free fall, the acceleration is constant (g, the gravitational acceleration), and so the velocity of the object constantly increases.

for objects near earth's surface, there is always another force acting on the object: the resistance due to the air. this force is opposed to the direction of fall of the object, and it is proportional to the velocity of the object, so as the object falls down, this force increases up to a point when it balances the force of gravity, and the object continues its motion at constant velocity (called terminal velocity). since in this case gravity is not the only force acting on the object, we are not in a situation of free fall.