Answer:

Explanation:
L = Initial length of segment = 79 m
T = Normal temperature = 
l = Width to be left for expansion
= Coefficient of linear expansion of the material = 
= Maximum temperature = 
= Change in temperature = 
The expression of linear expansion is given by

The expression for the minimum gap distance l the engineers must leave for a track rated at temperature
is 
Answer:
Car travel a distance of 60.06 m in 6 sec
Explanation:
We have given initial velocity v = 20 m/sec
Time = 6 sec
As the car stops finally so final velocity v = 0
From the first equation of motion
v = u+at (as the car velocity is slows down means it is a case of deceleration)
So v = u-at


Now from second equation of motion
8. The answer is C
9. Sorry I don't know
<span>Old age and hundreds of thousands to millions of member stars.</span>
Answer:
B, white light is made up of many different colors, D cannot be correct because A is not correct nor is C
Explanation: