According to the statement both bodies will experience the same force, by the effect of action and reaction, which would be the same to apply Newton's third law. By the characteristics presented both will have the same mass and the same acceleration. However, considering the sign of their charges, these being the same, they will be repelled from each other. When this movement is generated, the force will begin to decrease as the distance increases and therefore its acceleration will also decrease
Hence the correct option is equal and decreasing.
Answer:
It goes upward and downward
Explanation:
The way the man is moving the string indicates it goes movement of up and sown, I believe the straight line(B) is a distraction.
v = speed of the source of sound or the train towards the listener or switchman = 40 m/s
V = actual speed of sound = 340 m/s
f = actual frequency of sound as emitted from source or the train = 1000 Hz
f' = frequency as observed by the listener or by switchman = ?
Using Doppler's law , frequency observed by a listener from a source moving towards it is given as
f' = V f /(V - v)
inserting the values
f' = 340 x 1000 /(340 - 40)
f' = 340 x 1000/300
Answer:
Sonar
Explanation:
Sonar is a technique that involves the use of sounds in viewing substances in a water medium to aid movement or communication. It makes use of the advantage of sound waves traveling faster and farther in water when compared to other types of waves such as light waves.
During World War II, the military employed the use of SONAR in imaging the seafloor by sending pulses of sound waves down through the water and measuring the time it took for the sound to bounce off the seafloor and return to the receiver.
