Post Utme Physics Past Questions and Answers

Question 416:

A man can row a boat at 13 m/s in still water. If he aims at crossing to the opposite bank of a river flowing at 5 m/s, at what angle to the bank of the river must he row the boat?

A. 67.40
B. 210
C. 56.80
D. 22.60

Question 417:

The lower and upper fixed points of a thermometer are 30 mm and 180 mm respectively.
Calculate the temperature in degrees Celsius when the thermometer reads 45 mm.

A. 10.00C
B. 15.00C
C. 20.00C
D. 30.00C

Question 418:

An immersion heater rated400 W, 220 Vis used to heat a liquid of mass 0.5 kg. If the temperature of the liquid increases uniformly at the rate of 2.50C per second, calculate the specific heat capacity of the liquid assuming no heat loss,

A. 1100J/kg.K
B. 320J/kg.K
C. 200J/kg.K
D. 176J/kg.K

Question 419:

A balloon filled with 1000 cm3 of gas at 127oC and pressure of 70 cm Hg.
If the pressure changes to 28 cm Hg and temperature to -23.30C, calculate the new volume of the gas.

A. 136 cm³
B. 218 cm³
C. 250 cm³
D. 485 cm³

Question 420:

A density glass bottle contains 44.25 g of a liquid at 0oC and 42.02 g at 500C Calculate the real cubic expansivity of the liquid (Linear expansivity of glass= 1.0x10-5 K-1)

A. 1.09x10-3 K-1
B. 1.06x10-3K-1
C. 3.0x10-5 K-1
D. 1.03x 10-3K-1