The mass of saturn can be determined by applying kepler's 3rd law to the motion of a single ice particle in its rings. a) true b) false

A) True, the mass of Saturn can be determined by applying Kepler's 3rd Law to the motion of a single ice particle in its rings.  

Explanation:

Kepler's 3rd law states that the square of the orbital period of an object is directly proportional to the cube of the semi-major axis of its orbit. This is expressed as follows:

T² = 4π² a³ / GM

where

With a given period and semi-major axis, the mass of Saturn can be determined by applying Kepler's 3rd Law to the motion of a single ice particle in its rings.

measure their densities same density, same sub

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.