NECO Past Questions and Answers - Page 199

991.

The length of a simple pendulum is increased by a factor of four. By what factor is its period Increased?

A.

0.25

B.

0.5

C.

1.66

D.

2

E.

4

Correct answer is D

No explanation has been provided for this answer.

992.

When some ice cubes are added to a glass of warm water, the glass is cooled by a process of

A.

conduction only

B.

convection only

C.

conduction and convection

D.

conduction and radiation

E.

radiation only

Correct answer is C

No explanation has been provided for this answer.

993.

Mercury does NOT wet glass because

A.

glass is an amorphous substance

B.

the adhesive force is greater than the cohesive force

C.

the cohesive force is greater than the adhesive force.

D.

mercury has very high thermal conductivity

E.

mercury is opaque.

Correct answer is C

No explanation has been provided for this answer.

994.

When a yellow card is viewed in blue light, It will appear

A.

black

B.

orange

C.

purple

D.

red

E.

white

Correct answer is A

Yellow does not contain blue, so it will appear black under blue light