Answer:
A Gravitational potential energy
Bkinetic Energy
CGravitational potential energy
Dnone of this
Answer:
95.38 %
Explanation:
Transformer is an electrical device which has two or more coils of wire used to transfer electrical energy by changing magnetic field
Power of a transformer coil = voltage * Current
Transformer does not require any moving parts to transfer energy. Therefore we cannot see any friction or windage losses here. But they have some types of losses called “copper losses” and “iron losses” but generally these are quite small.
So there for it can affect the efficiency of the transformer also. Efficiency can be defined as follow
-- While gaining 2.15 m/s more speed every second, the van
would gain (2.15 x 7) = 15.05 m/s more speed in 7 seconds.
-- We're told that its speed at the end of the 7 seconds
is 20 m/s .
-- So its speed at the beginning of the 7 seconds must have been
(20 m/s - 15.05 m/s) = 4.95 m/s .
The answer is d) The 1.5 kg ball because it has more momentum.
Momentum = Impulse = Mass + Velocity
= 2 * 10 = 20 kg*m/s
= 1.5 * 20 = 30 kg*m/s
hence the 1.5 kg ball has greater momentum and impulse.
Source: http://forumvu.com/Thread-GSC101-Assignment-1-Solution-Fall-2017