JAMB Physics Past Questions & Answers - Page 18

A helioscope is an instrument used for observing the sun and sunspots.

The helioscope was first used by Benedetto Castelli and refined by Galileo Galilei.

Fiber 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.

A sea breeze describes a wind that blows from the ocean inland towards land.

This breeze occurs most often in the spring and summer months because of the greater temperature differences between the ocean and nearby land, particularly in the afternoon when the land is at maximum heating from the sun.

Examples of first class levers are pliers, scissors, a crow bar, a claw hammer, a see-saw and a weighing balance.

A wheelbarrow, a bottle opener, and an oar are examples of second class levers

Water is most anomalous at low temperatures, with a remarkable density maximum at 4°C.

water is not used as a thermometric liquid because it has low thermal expansivity, high specific capacity, high vapor pressure and wets glass.