Definition and determination of area expansivities - 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 2007

A blacksmith heated a metal whose cubic expansivity is 6.3 x 10^-6K^-1. The areal expansivity is

A. 2.0 x 10^-6K^-1
B. 2.1 x 10^-6K^-1
C. 4.2 x 10^-6K^-1
D. 6.3 x 10^-6K^-1