Gaseous helium is in thermal equilibrium with liquid helium at 6.4 k. the mass of a helium atom is 6.65 × 10−27 kg and boltzmann’s constant is 1.38066 × 10−23 j/k. determine the most probable speed of a helium atom. answer in units of m/s.

162.78 m/s is the most probable speed of a helium atom.

Explanation:

The most probable speed:

= Boltzmann’s constant =

T = temperature of the gas

m = mass of the gas particle.

Given, m =

T = 6.4 K

Substituting all the given values :

162.78 m/s is the most probable speed of a helium atom.

i think it's 35 meters

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.