Post Utme Physics Past Questions and Answers

Question 681:

A mass of gas at 700C and 70cm of mercury has a volume of 1200cm[sup]3[\sup].
Determine its volume at 2700C and pressure of 75cm of mercury

A. 1200cm[sup]3[\sup]
B. 1378cm[sup]3[\sup]
C. 4329cm[sup]3[\sup]
D. 4625cm[sup]3[\sup]

Question 682:

An electric heater is used to melt a block of ice of mass 1.5kg. If the heater is powered by a 12v battery and a current of 20A flows through the coil, calculate the time taken to melt the block of ice. (Specific latent heat of fusion of ice = 336 x 103 kg )

A. 76.0min
B. 35.0min
C. 21.0min
D. 2.9min

Question 683:

From the kinetic theory of gases temperature is a ____________

A. Form of energy and is proportional to the total kinetic energy of the molecules
B. Form of energy and is proportional to the average kinetic of the molecules
C. Physical property and is proportional to the average kinetic energy of the molecules
D. Physical property and is proportional to the average kinetic energy of the molecules

Question 684:

Light of wavelength 5000 x 10-8 travels in free space with a velocity of 3 x 10[sup]3[\sup]ms-1 .What is its wave length an glass of refractive index 1.5?

A. 3333 x10[sup]-8[\sup]cm
B. 500 x 10[sup]8[\sup]cm
C. 666 x10[sup]8[\sup]
D. 75000x10[sup]8[\sup]

Question 685:

an object is placed 5.6 x 102cm in front of a converging lens of focal length 1.0 x10[sup]-1[\sup], the image formed is ____________

A. Real, erect, and magnified
B. Virtual, erect and magnified
C. Real, inverted and magnified
D. Virtual, erect and diminished