Question

6
3 The motion of molecules of a gas is:
a) One dimensional
b) Three dimensional
c) Two dimension
d) up-down​

Answer 1

Answer:

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Explanation:

If a particle is moving in a single direction throughout its journey then it is said to be moving in one dimension. For example, an ant moving along X-axis.  Motion is described in terms of displacement (x), time (t), velocity (v), and acceleration (a). Velocity is the rate of change of displacement and the acceleration is the rate of change of velocity.

Answer 2

Answer:

The correct answer is (c). The motion of molecules of a gas is two-dimensional.

Explanation:

• The gaseous particles move continuously in a straight line.
• Two dimensions are used to express a straight line.
• A group of items restricted to move in a planar or another two-dimensional region while gaseous is referred to as a two-dimensional gas.
• The objects can be any collection of discrete physics objects that obeys the laws of motion without interacting in any way, such as elementary particles or classical ideal gas elements like rigid discs colliding in elastic waves.
• The movement of the gas particles must therefore also be two-dimensional.
• A monatomic gas molecule has two translational degrees of freedom in two dimensions.

Thus, the motion of molecules of a gas is two-dimensional.

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