Answer: Later
Explanation:
In cold weather the air is more dense and that is what causes the cold. It is hard for sound waves to travel through it.
It would be equal to 2r = 2* 150 = 300m
Answer:
Acceleration, 
Explanation:
Given that,
Mass of a truck, m = 2000 kg
Force used to move the truck, F = 4200 N
We need to find the acceleration of the truck. The force acting on the truck is given by the expression as follows :
F = ma
a is the acceleration of the truck

So, the acceleration of the truck is
.