Astep-down transformer is used for recharging the batteries of portable electronic devices. the turns ratio n2/n1 for a particular transformer used in a dvd player is 1: 13. when used with 120-v (rms) household service, the transformer draws an rms current of 20.0 ma from the house outlet. find
(a) the rms output voltage of the transformer and
(b) the power delivered to the dvd player.

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(a) assume the equation x = at^3 + bt describes the motion of a particular object, with x having the dimension of length and t having the dimension of time. determine the dimensions of the constants a and b. (use the following as necessary: l and t, where l is the unit of length and t is the unit of time.) (b) determine the dimensions of the derivative dx/dt = 3at^2 + b. (use the following as necessary: l and t, where l is the unit of length and t is the unit of time.)

How many neutrons does element x if it’s atomic number is 28 and its mass number is 87