The thermos flask - Jamb Physics Past Questions and Answers

Question 1:

• JAMB 2019

If the time of flight is 96seconds, calculate the horizontal range through the point of projection.

A. 84400m
B. 69000m
C. 61440m
D. 24000m

Question 2:

• JAMB 1987

The vacuum in a thermos flask helps to reduce heat transfer by?

A. Convection and radiation
B. Convection and conduction
C. Conduction and radiation
D. Radiation only

Question 3:

• JAMB 1992

The space between the double glass walls of a thermos flask is evacuated space are silvered. The residual source of heat loss takes place by

A. Convection
B. Radiation from the surface
C. Conduction through the stopper and the glass
D. Conduction across the walls