A narrow coil of 10 turns and area 4×〖10〗^(-2) m^2 is placed in a uniform magnetic field of flux density B of 〖10〗^(-2) T, so that the flux links the turns normally. If the coil is rotated about an axis through its middle so that it turns through 60° in 0.2 seconds, calculate the average induced emf.

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.)