NECO Physics Past Questions & Answers - Page 47

231.

A body of weight 20N displaces 12N of the liquid in which it is immersed. What is the upthrust of the liquid on the body?

A.

240N

B.

32N

C.

20N

D.

12N

E.

8N

View answer & explanation

Correct answer is D

No explanation has been provided for this answer.

232.

In which simple machine is the effort applied between the load and the fulcrum?

A.

claw hammer

B.

nut crackers

C.

pliers

D.

sugar tongs

E.

wheelbarrow

View answer & explanation

Correct answer is D

No explanation has been provided for this answer.

233.

A body executing a simple harmonic motion has an angular velocity of 22 radians per second. If it has a maximum displacement of 10cm, what is its linear velocity?

A.

1100ms^-1

B.

440 ms^-1

C.

220 ms^-1

D.

22 ms^-1

E.

2.2ms^-1

View answer & explanation

Correct answer is E

Amplitude[r] =10cm =0.1m.

Angular velocity[w] =22 radians per second

Linear velocity=wr
V=22×0.1
V=2.2m/s

234.

A block of ice of mass 10kg at 0°C absorbs heat energy from its surroundings and changes to water at the same temperature. The heat absorbed is referred to as

A.

heat capacity

B.

latent heat

C.

specific heat

D.

specific heat capacity

E.

specific latent heat.

View answer & explanation

Correct answer is B

No explanation has been provided for this answer.

235.

What part of the camera corresponds to the iris of the eye?

A.

diaphragm

B.

film

C.

focusing ring

D.

lens

E.

shutter

View answer & explanation

Correct answer is A

No explanation has been provided for this answer.

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