Answer:
D. Wind and solar energy help save money and reduce air pollution.
Explanation:
I think it was Isaac Newton
Answer:
75.8
Explanation:
because just divide 1.27 into 0.75 and there's your answer
It will travel slowest through gases.
Answer:
a) 
b) 
c) 
Explanation:
Given masses:


Velocity of mass 1, 
Velocity of mass 2, 
a)
Initial momentum:



b)
magnitude of initial momentum:


From the conservation of momentum:



is the magnitude of final velocity.
Direction of final velocity will be in the direction of momentum:




c)
Vertical component of final velocity:

