ECAT MCQs

If two systems are each in thermal equilibrium with a third, they are in equilibrium with each other.
This permits consistent temperature measurement.

Specific heat capacity describes thermal inertia.
Materials with high values require more heat for the same temperature rise.

Latent heat changes molecular arrangement rather than temperature.
Fusion and vaporization involve different latent heats.

Heating usually increases average particle separation.
Solids, liquids, and gases expand by different amounts.

Torque is rF sinθ.
τ=2×20×sin30° = 20 N·m.

Viscosity represents internal friction between layers.
More viscous fluids resist deformation more strongly.

The pressure is 100/0.01 = 10,000 Pa.
Output force is 10,000×0.20 = 2000 N.

Angular velocity is angular displacement divided by time.
ω=10/2 = 5 rad/s.

Streamline or laminar flow has ordered layers.
Turbulent flow contains irregular fluctuations and mixing.

Buoyant force equals ρVg.
F=1000×0.03×10 = 300 N.

Angular acceleration is change in angular velocity over time.
α=(16-4)/3 = 4 rad/s².

Cohesive molecular forces create surface tension.
It makes a liquid surface behave like a stretched membrane.