Question 821:

• JAMB 1995

A quantity of ice at 10^oC is heated until the temperature of the heating vessel is 90^oC. Which of the following constants is NOT required to determine the quantity of heat supplied to the vessel?

A. Specific heat capacity of ice
B. Specific heat capacity of water
C. Specific latent heat of fusion
D. Specific latent heat of vaporization

Question 822:

• JAMB 1995

Which of the following statements give the TRUE difference between evaporation and boiling? i. Evaporation occurs at all temperatures while boiling occurs at a fixed temperature for a given pressure. ii. Evaporation is a surface phenomenon while boiling is an interior phenomenon. iii. Evaporation is affected by surface area while boiling is not.

A. I and ii only
B. I and iii only
C. Ii and iii only
D. I, ii, iii.

Question 823:

• JAMB 1995

A well-lagged bar of length 100cm has its ends maintained at 100^oC and 40^oC respectively. What is the temperature at a point 60cm from the hotter end?

A. 58^oC
B. 62^oC
C. 64^oC
D. 76^oC

Question 824:

• JAMB 1995

Which of the following is the exclusive property of a transverse wave?

A. Diffraction
B. Refraction
C. Compression
D. Polarization

Question 825:

• JAMB 1995

The wavelength of signals from a radio transmitter is 1500mm and the frequency is 200kHz. What is the wavelength for a transmitter operating at 100kHz?

A. 7500m
B. 300m
C. 75m
D. 15m