WAEC Physics Past Questions & Answers - Page 9

A mechanical wave is a wave that is an oscillation of matter. 

A sound wave is a mechanical wave that propagates along or through a medium by particle-to-particle interaction.

Sound waves, water waves and seismic waves are some examples of mechanical waves mechanical wave. 

The kinetic-molecular theory of gases assumes that ideal gas molecules:

(1) are constantly moving;

(2) have negligible volume;

(3) have negligible intermolecular forces;

(4) undergo perfectly elastic collisions; and

(5) have an average kinetic energy proportional to the ideal gas's absolute temperature.

Joule as the unit of work done or energy used.

Force = mass × acceleration
 Work = Force × Distance
 Work = mass x acceleration x distance

Joule = kg × \(\frac{m}{s^2}\) × m

→ kg m\(^2\) s\(^{-2}\) 

Mathematically;  S = vt + \(\frac{1}{2}\) at\(^2\)

: S ∝ t\(^2\)

If a body moves with uniform retardation, the velocity-time graph is a straight line.

A system is in neutral equilibrium if its equilibrium is independent of displacements from its original position. A marble S on a flat horizontal surface is an example.

cubic and linear expansivity are related by this equation. γ=3α.

The period of a simple pendulum is doubled, when its length is made four times.

Archimede's Principle states that a body immersed in a fluid experiences an upthrust equal to the weight of the fluid displaced, and this is fundamental to the equilibrium of a body floating in still water.

It is a graph that represents the force that acts on a body in a certain amount of time.
Force on the object is represented by the y-axis and time taken by the object is represented by the y axis.
The area under the curve indicates the impulse, the change in momentum that the object undergoes.