CSS MCQs

Pressure is force distributed over an area.
The same force produces greater pressure on a smaller area.

A loudspeaker uses electrical signals to move a diaphragm.
The diaphragm produces sound waves in air.

A sharp edge concentrates force over a small area.
This creates greater pressure and makes cutting easier.

Heat flows from a hotter body to a cooler body.
It is energy in transit rather than a material substance.

Pressure is measured in pascals.
One pascal equals one newton per square metre.

Temperature indicates how energetic particle motion is on average.
It determines the direction of heat flow.

Pascal's law states that pressure applied to a confined fluid is transmitted equally.
This allows force multiplication in hydraulic brakes.

Spontaneous heat transfer occurs from higher to lower temperature.
It continues until thermal equilibrium is approached.

Water exerts an upward buoyant force on immersed objects.
Floating occurs when this force balances the object's weight.

Archimedes' principle relates buoyant force to displaced fluid.
The upward force equals the weight of the displaced fluid.

Average speed is total distance divided by total time.
Thus, 120 ÷ 2 = 60 km/h.

A ship contains large air-filled spaces.
Its total mass spread over its volume gives an average density below water.