Physics, 03.08.2019 03:00 KallMeh

According to the kinetic theory, collisions between molecules in a gas cause a loss of total kinetic energy never occur are perfectly elastic are inelastic

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Answer from: jmeza502506

According to the kinetic theory of gases, the collisions between the molecules of gas are perfectly elastic.

Further Explanation:

The kinetic theory of gases aims at describing the several properties and activities of the molecules of a gas which are based on the molecular weight of the gas molecules and their motion the gas.

According to the kinetic theory of gases, the molecules of gas are present all across the volume but larger portion of the volume occupied remains empty. All the molecules of the gases are in random motion and they always keep moving.

When the gas molecules collide with the walls of the container or with other molecules, there is no loss in the kinetic energy of the gas molecules. It means that all the collisions occurring inside the gas sample are perfectly elastic.

Therefore, the collisions between the gas molecules are perfectly elastic and do not cause any loss of kinetic energy.

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Answer Details:

Grade: Senior School

Chapter: Kinetic theory of gases

Subject: Physics

Keywords: Kinetic theory of gases, perfectly elastic collisions, molecules of a gas, loss of kinetic energy, volume occupied, collisions occurring, molecular weight.

Answer from: doughboy123

According to kinetic theory, the gas does not lose its energy; thus, since a gas' internal energy is the kinetic energy of its molecules, the first answer is wrong. It is posited that the distances between gas molecules are big, that this does not mean that collisions never happen. This would be a very bad assumption for a kinetic model of gases. If the collisions were inelastic, by definition the total kinetic energy would decrease. Hence the correct answer is that the collisions are elastic; no kinetic energy is lost in these.

Answer from: Quest

the minimum constant speed at which she can catch the train is 2.7 m/s

given:

acceleration = 0.6 $\frac{m}{s^{2} }$

time = 4.5 s

to find:

velocity = ?

formula used:

from 1st kinematic equation we get,

v = u + at

u = initial speed of train = 0 m/s

v = final speed of the train

a = acceleration of the train

t = time

solution:

from 1st kinematic equation we get,

v = u + at

u = initial speed of train = 0 m/s

v = final speed of the train

a = acceleration of the train

t = time

v = 0 + (0.6 × 4.5)

v = 2.7 m/s

the minimum constant speed at which she can catch the train is 2.7 m/s

Answer from: Quest

Ibelieve the answer is b

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