7 This toy bounces up and down on a spring. potential energy kinetic energy
a) Explain why there are two arrows between the
boxes in the energy flow diagram.
b) The toy will eventually stop. Explain why this
will happen in terms of energy transfers. [3]
c) i) What are the two forms of potential energy?
ii) At which part of each bounce does the toy
have these forms?
[4]

Acoil formed by wrapping 80 turns of wire in the shape of a square is positioned in a magnetic field so that the normal to the plane of the coil makes an angle of 28.0° with the direction of the field. when the magnetic field is increased uniformly from 200 µt to 600 µt in 0.400 as, an emf of magnitude 80.0 mv is induced in the coil. what is the total length of the wire?

Which of the following statements correctly describes a transformer?

The average time that it takes for the car to travel the first 0.25m is s. the average time to travel just between 0.25 m and 0.50 m is s. given the time taken to travel the second 0.25 m section, the velocity would be m/s.