C At a small power station, the generator produces alternating current at a voltage of 10KV. This must be reduced to 415 V for use in a factory
The transformer used for this purpose has a primary coil of 2000 turns. How many turns must its secondary con
have?

Aplayground slide is 8.80 ft long and makes an angle of 25.0° with the horizontal. a 63.0-kg child, initially at the top, slides all the way down to the bottom of the slide. (a) choosing the bottom of the slide as the reference configuration, what is the system's potential energy when the child is at the top and at the bottom of the slide? what is the change in potential energy as the child slides from the top to the bottom of the slide? (include the sign of the value in your answer.)