Answer:
14.47 m/s
Explanation:
The momentum must be preserved before and after the collision:
The total momentum before the collision
where 
are the masses of the car moving south and north, respectively, before the collision. 
is the velocity of the car moving South. We take the velocity to the North as the positive direction
The total momentum after the collision
where V = 5.22m/s is the velocity of both cars after the collision
We can equalize the 2 equations and plug in the numbers:
Answer:
The correct option is B
B) Scientists can measure how much pollution is given off.
Explanation:
A) To determine what kind of plants do people want, a polling or a survey is carried out. It is not the job of a scientist to carry that out.
B) Scientist have derived various techniques to measure different kinds of pollution. For example, air pollution can be derived from the Air Quality Index, which measure the quality of the air. The higher the value of Air Quality Index, more is the pollution.
C) Scientists are not allowed to pass any laws regarding pollution. Any kind of laws, including those related to pollution are passed by the Congress.
D) Most of the powerplants in US are owned by private business, while some are under control of the government.
The player and the ball have the same displacement.
