Fperson =[( velocity of wind )+ or - (velocity of person)] / [(velocity of wind) + or - (velocity of sounds)] x frekuency of sounds
Answer:
Personally I don't believe aliens exist maybe they do who knows but i don't think so.
Explanation:
The answer that fits the blank is SOURCE REDUCTION. Source reduction refers to the prevention of further pollution by eliminating the source before this can produce the wastes. This helps in the reduction of pollution, thus reduces the amount of toxins brought by these wastes that may harm the environment.
Answer:

Explanation:
It is given that,
The coordinates of a particle in the metric xy-plane are differentiable functions of time t are given by :


Let D is the distance from the origin. It is given by :

Differentiate above equation wrt t as:

.............(1)
The points are given as, (12,5). Calculating D from these points as :

Put all values in equation (1) as :


So, the particle is moving away from the origin at the rate of 7.076 m/s. Hence, this is the required solution.