An AC adaptor for a telephone answering unit uses a transformer to reduce the line voltage of 238 V (rms) to a voltage 7.5 V. The rms current delivered to an answering system is 345 mA. If the primary (input) coil in the transformer in the adaptor has 260 turns, how many turns are there on the secondary (output) coil

(01.02 mc) nicole pushes her bike up a hill. overhead, the sun exerts a gravitational force on earth. which statement is true about the bike and earth? they both experience contact forces. they both experience non-contact forces. the bike experiences a non-contact force and earth experiences a contact force. the bike experiences a contact force and earth experiences a non-contact force. they both experience non-contact forces.

6–43 a food department is kept at 2128c by a refrigerator in an environment at 308c. the total heat gain to the food department is estimated to be 3300 kj/h and the heat rejection in the condenser is 4800 kj/h. determine the power input to the compressor, in kw and the cop of the refrigerator.

Most of the volume of an atom is occupied by the