Answer:
it increases economical level .water will be polluted.water cycle do not take place nicely.it causes global warming and acid rainfall
The answer is <span>The power will decrease to 75 percent of its previous value
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To solve this problem we will apply the linear motion kinematic equations, specifically the concept of acceleration as a function of speed and time, as well as Newton's second law.
PART A) Acceleration can be described as changing the speed in a period of time therefore,

Force is the proportional change between mass and acceleration therefore


PART B) We will apply the same concept given but now we will change the time to 21s therefore:

Now the force


<span>C. A concave lens can only form a virtual image, because they are thinner in the middle and thicker around the edges.</span>