A gas occupies a certain volume at 27°C. At what temperature will it volume be doubled, assuming that its pressure remains constant?

327

Explanation:

The temperature at which the volume would be doubled is 327 .

Using the formula from Charles' law:

V1/T1 = V2/T2, where V1 = initial volume, T1 = initial temperature, V2 = final volume, and T2 = final temperature.

In this case, V2 = 2V1, T1 = 300 K (27 + 273), and T2 is what we are looking for.

Substituting the different entities in the equation:

V1/300 = 2V1/T2

    T2 = 300 x 2 = 600K

Hence, T2 = 600 - 273 = 327

need to see circuit to get time constant

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.