WAEC Physics Past Questions & Answers - Page 133

662.

The mass attached to a string is moving in a circular path. If the speed is doubled, the tension in the string will be

A.

doubled

B.

halved

C.

four times as great

D.

one-fourth as much

Correct answer is C

No explanation has been provided for this answer.

664.

The diagram above represents the displacement-time graph of the motion of an object thrown upwards. The velocity of the object at the point P is

A.

maximum

B.

uniform

C.

zero

D.

terminal

Correct answer is C

No explanation has been provided for this answer.

665.

The diagram above illustrates a Hare's apparatus. \(\mathit{e}_1, \mathit{e}_2\) represent densities and \(\mathit{h}_1, \mathit{h}_2\) heights of columns of liquids. Which of the following equations is correct?

A.

\(\mathit{h}_1 = \frac{\mathit{h}_2 \mathit{e}_1}{\mathit{e}_2}\)

B.

\(\mathit{h}_1 = \frac{\mathit{h}_2 \mathit{e}_2}{\mathit{e}_1}\)

C.

\(\mathit{h}_1 = \frac{\mathit{e}_1 \mathit{e}_2}{\mathit{h}_2}\)

D.

\(\mathit{h}_1 = \frac{\mathit{e}_1}{\mathit{h}_2 \mathit{e}_2}\)

Correct answer is B

\(\frac{\mathit{h}_2}{\mathit{h}_2} = \mathit{h}_1 = \frac{\mathit{h}_2 \mathit{e}_2}{\mathit{e}_1}\)