I think the corect answer would be C. When a police officer receives information that you are speeding in your vehicle, she is using the frequency of the wave to measure the Doppler Effect. As the speed of a vehicle increases, the greater the change of the frequency of the waves would be transmitted to the radar guns which is being used by the police officer. Doppler effect is an effect that is observed in sound and light waves as these waves move away or to the direction of the observer. This is being used in many applications like in astronomy, weather balloons, the radar guns,and for underwater researches.
Answer:
At centroid
Explanation:
In the given equilateral triangle ABC with side of 1 m. The three equal charges e,e,e are placed at the A,B and C.
And the fourth charge 2e is put at point O which is called centroid.
Now we can calculate the distance AD by applying pythagorean theorem as,
Put the values and get.
Now calculate AO as,
And the sides BO=CO=AO.
Now Force can be calculated as
And similarly,
Now we can calculate resultant of in upward direction. as,
Therefore the resultant force on centroid O.
Therefore the fourth charge 2e should be placed on centroid so that it experience zero force.
Momentum is defined as the product of force and mass.
therefore it is
p=mv
that is product=mass×force
hope it helps:)
Answer:
Did you ever get the answer?
Explanation:
Answer:
42Amp
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