Post Utme Physics Past Questions and Answers

Question 391:

The density of nitrogen at standard temperature and pressure is 1.251 kgm
Calculate the root mean square velocity of nitrogen molecules.

A. 240 m/s
B. 1x104 m/s
C. 340 m/s
D. 493 m/s

Question 392:

A malaria patient has a body temperature of 98.6°F.
What is this temperature on the Celsius scale?

A. 37°C
B. 20°C
C. 32°C
D. 35°C

Question 393:

A thermos bottle containing 250 g of coffee at 90°C is added with a 20 g of milk at 5°C After thorough mixing, what is the final temperature?
c for water, coffee and milk is 1.00Cal/g °C

A. 84°C
B. 84°K
C. 84°F
D. 55°C

Question 394:

Determine the temperature Tf that results when 150 g of ice at 0°Cis mixed with 300 g of water at 50°C

A. 67°C
B. 6.7°C
C. 48°C
D. 80°C

Question 395:

The only mode of heat energy transfer that needs no material medium is ____________

A. Convection
B. Radiation
C. Conduction
D. Thermal conduction