8. You are fixing a transformer for a toy truck that uses an 8.0-V emf to run it. The primary coil of the transformer is broken; the secondary coil has 30 turns. The primary coil is connected to a 120-V wall outlet. a) How many turns should you have in the primary coil

Atoy airplane, flying in a horizontal, circularpath, completes 10. complete circles in 30.seconds. if the radius of the plane’s circular pathis 4.0 meters, the average speed of the airplane is(1) 0.13 m/s (3) 1.3 m/s(2) 0.84 m/s (4) 8.4 m/s

The focal length of a lens is determined by the curve of the lens and the material that the lens is made from. (5 points) is this true or false? ?

An electromagnetic radio wave is received by a transmitter before it is converted to a sound wave. the radio wave has a wavelength of 23,076 m and a frequency of 13,000 hz. what velocity is the wave traveling at before the transmitter converts it to a sound wave? a 1.76 m/s b 0.56 m/s c 3.31 × 102 m/s d 3.00 × 108 m/s