2022 - JAMB Physics Past Questions and Answers - page 3

According to Clausius–Clapeyron relation, the vapour pressure of any substance increases non-linearly with temperature.

Elastic potential energy[Ee] = \(\frac{1}{2} ke^2\).

Let:
pressure = p
depth/height = h
density = d
gravity = g

p = hdg

\(\frac{p}{dg} = h\)

\(\frac{9100}{10 * 2000} = h\)

h = 0.455m

Because water wets glass, has a higher freezing point and lower boiling point than many other liquids, low thermal expansivity, high specific capacity, and high vapour pressure.

Examples of second-class levers:

• bottle opener
• wheelbarrow
• an oar

Examples of first-class levers:

• weighing balance
• pliers
• claw hammer
• scissors
• crowbar

Fibre optic couplers are used to split the input signals into two or more outputs, they are called splitters in this case. On the other hand, some types of couplers can be used to combine two or more inputs into one single output, they are called combiners in this case.

More.

A helioscope is an instrument for viewing the Sun without harming the eye. It is used for observing the sun and sunspots. The helioscope was first used by Benedetto Castelli and later refined by Galileo Galilei.

Lunar eclipses occur when Earth is positioned between the Moon and Sun and the Earth's shadow is cast on the surface of the Moon.

A body would weigh six times less on the moon than it weighs on Earth. In other words, the body would weigh six times more on the earth than it weighs on the moon.

Hence,

\(\frac{1}{6} of x\) = 6.0N on the moon

x = 6 * 6

x = 36