Answer:
to prevent the derailing of the train due to thermal expansion.
Answer:
169.98 m
Explanation:
= Thermal coefficient of marble = 
= Initial length = 170 m
= Change in temperature = (-10-35)°C
Change in length is given by
The height on the given day will be 
It is b. It gains momentum when going down. Think of it like a sled. When you go up the hill, it goes slower, but when you go down the hill, you gain speed(momentum) and it increases
Your answer is B i know this because i took this last week
Explanation:
I don't have time for you
