Answer:
2 the speed of the second ball is larger than that of the first one
Explanation:
Using the equations of motion
The second ball was thrown up , on getting to its highest point V=0, H=1/2gt^2
The second ball was. Now has two heights , the distance from the rooftop and the height it reached when the ball was thrown up.
v^2= u^2+2a(H1+H2)
The first ball has a velocity of v^2=2gH
Therefore the second ball velocity is larger than the first ball
Answer:
because the mass of the apple is very less compared to the mass of earth. Due to less mass the apple cannot produce noticable acceleration in the earth but the earth which has more mass produces noticable acceleration in the apple. thus we can see apple falling on towards the earth but we cannot see earth moving towards the apple.
C. Gamma rays have more energy than infrared rays
Explanation:
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When two waves interact with their crests and troughs in alignment is called constructive interference. If two waves of the same wavelength occupy the same space in such a way that their crests and troughs align, the wave they produce will have an amplitude greater than that possessed by either wave initially. This is known as constructive interference. The more closely the waves are in phase—that is, perfectly aligned—the more constructive the interference.
