Compare and contrast the 3 types of fossil fuels (natural gas, oil, coal) in terms of the pollution they produce.

I believe that they all produce carbon dioxide and all come from the ground. I dont know any differences about all so sorry.

Explanation:

the chart show the masses and velocities of two colliding objects that stick together after a collision.

according to the law of conservation of momentum, the momentum of the object after the collision is  

answer

1,500

kg • m/s.

one person pulls 90n one way and the other has 100n pulling the other way.

so the net force = 90 - 100 = -10n,

or the ans can be 10n if the picture shows -90n and 100n instead.