Bcoz when you place a magnet close enough the magnet attracts or repals without any other fore we dont touch the magnet so it is non contact
Answer:
F = 1908 N
Explanation:
GIVEN,
Incident water stream has a velocity = U = +18.0 m/s,
Exiting water stream has a velocity = V = -18.0 m/s.
Mass of water per sec : M / t = 53 kg /s
Change in velocity d v =18 m / s – ( -18 m / s)
= 36 m / s
Magnitude of the average force exerted on the water by the blade
F = ( M / t ) x dv
=( 53 kg /s ) x ( 36 m/s )
F = 1908 N
Ok, but where’s the question?
Answer:
( Galileo )discovered evidence to support Copernicus' heliocentric theory when he observed four moons in orbit around Jupiter
