A transformer is used to operate a model train. The transformer, which is plugged into a standard electrical outlet, produces an output voltage of 15.0 V (rms), applied to the train's tracks. (The voltage supplied to transformer from outlet is 120 V.) (a) What is the ratio of the number of turns in the primary to the number of turns in the secondary?
(b) If the train uses an average power of 14.0 W, what are the rms currents in the secondary and in the primary? Assume an ideal transformer, with no energy loss.

The metal wire in an incandescent lightbulb glows when the light is switched on and stops glowing when it is switched off. this simple process iswhich kind of a change? a.a physical changeb. a chemical changec. a nuclear changed. an ionic change

Boxing gloves are padded to lessen the force of a blow. (a) calculate the force exerted by a boxing glove on an opponent’s face, if the glove and face compress 7.50 cm during a blow in which the 7.00-kg arm and glove are brought to rest from an initial speed of 10.0 m/s. (b) calculate the force exerted by an identical blow in the gory old days when no gloves were used and the knuckles and face would compress only 2.00 cm. (c) discuss the magnitude of the force with glove on. does it seem high enough to cause damage even though it is lower than the force with no glove?

Which of these questions might a character ask if the conflict is man versus self? a. which path should i take to better myself? b. which boulder will be too heavy for me to carry? c. which friend is going to ditch me today? d. all of the above