WAEC Physics Past Questions & Answers - Page 114

566.

The advantages of the thermoelectric thermometer include the following characteristics except that it

A.

can measure rapidly changing temperatures

B.

can measure high and low temperature

C.

can measure high and low temperature almost at a point

D.

is fairly sensitive

Correct answer is D

No explanation has been provided for this answer.

567.

A thermometer records 680 mmHg at steam point and 440 mmHg at ice point. The temperature it records at 380 mmHg is

A.

-25oC

B.

-20oC

C.

20oC

D.

25oC

Correct answer is A

\(\frac{440 - 380}{680 - 380} = \frac{0 - x}{100 - x}\)

= -25oC

568.

A machine is said to be a third class lever when the

A.

load is between the fulcrum and effort

B.

fulcrum is between the effort and the load

C.

effort is between the fulcrum and load

D.

fulcrum is directly below the load

Correct answer is C

No explanation has been provided for this answer.

569.

Which of the following sources of energy is/are exhausible? i. Solar ii. Fossil fuels iii. Tidal power

A.

i, ii and iii

B.

i and ii only

C.

i and iii only

D.

ii and iii only

Correct answer is D

No explanation has been provided for this answer.