Answer:
a) 9.6 m/s
b) 11.7 m/s
c) 12 m/s
Explanation:
This problem can be solved by the Conservation of Momentum principle, which establishes that the initial momentum 
must be equal to the final momentum 
:
(1)
Where:
(2)
(3)
is the mass of green ball
is the mass of the blue ball
is the initial velocity of the green ball
is the initial velocity of the blue ball
is the final velocity of the green ball
is the final velocity of the blue ball
Substituting (2) and (3) in (1):
(4)
Isolating :
(5)
(6) This is the equation we will use for the next cases
Knowing this, let's begin with the answers:
a) In this case 
and we have to find
(7)
(8)
b) In this case 
and we have to find
(9)
(10)
c) In this case 
and we have to find
(11)
(12)
The internal combustion engine has been criticized for ages for its negative effects on human health as well as the deterioration that it has caused to the environment with the release of Carbon Dioxide (CO2). However, to settle the skeptics, studies have been conducted to prove the environmental benefits of the internal combustion engine.
According to an article written by Dr. Dwight R. Lee, an Economist at the University of Georgia, livestock is responsible for 18% of the greenhouse gases that cause global warming, a far higher statistic than the contribution made by automobiles and aircrafts. The internal combustion engine began replacing horses as a source of power in the early 1900s, which started replacing the outputs from animals with exhaust from tailpipes.
Answer:
The 2nd one
Explanation:
It takes a long time to replenish.. ex:- fossil fuel
This is my notes from last year my teacher really dumbed it down for us lol and it really helped but I'm not so sure if ur question would be answer with this but ik it will help with other problems for Physics I just thought I would share it I hope this helps have a lovely nite and good luck with this question let me know if the pics are good or not!
