Question 151:

• JAMB 1980

Given that SQ = 10cm and SP = 6cm, the refractive index of a block of glass shown above is

A. 0.30
B. 0.60
C. 1.67
D. 2.33
E. 2.36

Question 152:

• JAMB 1980

In the diagram above, MN is perpendicular to ON and MR what is the difference between the moment about N of the force of 20 Newtons applied along MP an its moment about 0

A. Zero
B. 0.2N.m
C. 0.4N.m
D. 0.8N.m
E. 0.6N.m

Question 153:

• JAMB 1981

The ice and steam points of mercury-in-glass thermometer of centigrade scale and of uniform bore correspond respectively to 3cm and 19cm lengths of the mercury thread when the length is 12cm, the temperature is

A. 32^oC
B. 48^oC
C. 56^oC
D. 65^oC
E. 75^oC

Question 154:

• JAMB 1981

The ice and steam points of mercury-in-glass thermometer of centigrade scale and of uniform bore correspond respectively to 3cm and 19cm lengths of the mercury thread when the length is 12cm, the temperature is

A. 32^oC
B. 48^oC
C. 56^oC
D. 65^oC
E. 75^oC

Question 155:

• JAMB 1981

A vapour is said to be saturated when

A. Moer molecules return to the liquid than leave it
B. A dynamic equilibrium exists between the liquid molecules and the vapour molecules at a given temperature
C. The vapour pressure is atmospheric
D. The temperature of the vapour varies
E. All molecules are moving with the same speed