WAEC Physics Past Questions & Answers - Page 317

1,581.

Which of the following instrument may be used to measure the relative humidity?

A.

Hydrometer

B.

Barometer

C.

Manometer

D.

Hypsometer

E.

Hygrometer

View answer & explanation

Correct answer is E

No explanation has been provided for this answer.

1,582.

The temperature at which the water vapour present in the air is just sufficient to saturate it is called the

A.

ice point

B.

boiling point

C.

steam point

D.

dew point

E.

saturation point

View answer & explanation

Correct answer is D

No explanation has been provided for this answer.

1,583.

0.5kg of water at 10^oC is completely converted to ice by extracting 188000J of heat from it. If the specific heat capacity of water is 4200J kg^-1C^-1, calculate the specific latent heat of fusion of ice.

A.

9.0 KJ kg^-1

B.

84.0 KJ kg^-1

C.

168.0 KJ kg^-1

D.

334.0 KJ kg^-1

E.

336.0 KJ kg^-1

View answer & explanation

Correct answer is D

Q = mcΔθ = (0.5 x 4200 x 10) + 0.5L
L = 334000

1,584.

Which of the following statements about radiant heat is/are not correct?
I. radiant heat cannot travel through a vacuum
II. rough surfaces emit radiant heat more than polished surfaces
III. Dark surfaces absorb radiant heat more than bright surfaces

A.

I only

B.

II only

C.

III only

D.

I & II only

E.

II & III only

View answer & explanation

Correct answer is A

No explanation has been provided for this answer.

1,585.

In which of the following is the expansion of solids a disadvantage?

A.

the fitting of wheels in rims

B.

fire alarms

C.

the thermostat

D.

the bimatellic thermometer

E.

the balance wheel of a watch

View answer & explanation

Correct answer is E

No explanation has been provided for this answer.

WAEC Subjects

English Language

Agricultural Science

Physical Education

Further Mathematics

Literature in English

Islamic Religious Knowledge

Christian Religious Knowledge

Office Practice

Civic Education

Aptitude Tests

Data Interpretation Questions and Answers

Microsoft Office Questions and Answers

Spatial Reasoning Questions and Answers

Nigeria General Knowledge Questions and Answers

Abstract Reasoning Questions and Answers

Personality Test

Logical Reasoning Questions and Answers

Verbal Reasoning Questions and Answers

Numerical Reasoning Questions and Answers

Quantitative Reasoning Questions and Answers

Puzzles Questions and Answers

Typing Speed and Accuracy Test

Situational Judgement Questions and Answers

View latest jobs in Nigeria today