Kinetic Theory Test

Result

Kinetic Theory Test - 5

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Weekly Quiz Competition

Question 1
1 / -0

For a rope of yield strength S_y loaded in tension with weight Mg the minimum area A of the rope should be

A
A ≥ Mg/ S_y

B
A ≥ Mg/3 S_y

C
A ≥ Mg S_y

D
A ≥ Mg/2 S_y

Solution

We know that Yield strength times the Area give the weight of the body.

As Yield strength = weight of body/area

For safety purposes

Yield strength ≥ weight of body/area

S_y ≥ Mg/A

A ≥ Mg/ S_y
Question 2
1 / -0

Mean free path is the

A
minimum distance between collisions

B
average distance between collisions

C
(maximum distance + minimum distance )/ 2 between collisions

D
maximum distance between collisions

Solution

the mean free path is the average distance traveled by a moving particle (such as an atom, a molecule, a photon) between successive impacts (collisions), which modify its direction or energy or other particle properties.
Question 3
1 / -0

Figure shows plot of PV / T versus P for 1.00×10⁻³kg of oxygen gas at two different temperatures. Comparing T₁ and T₂

A
T₁ > T₂

B
T₁ ≥ T₂

C
T₁ < T₂

D
T₁ = T₂

Solution

For 1 mole of ideal gas, according to ideal gas equation
PV = RT
PV/T = R = constant
Hence graph must be with zero slope. So that dotted line show ‘ideal’ gas behaviour and curved line shows deviation from ‘ideal’ gas behavior.
A real gas behave as ideal gas at high temperature. Temperature T₁is close to dotted line.
so that T₁ > T₂