Electricity is distributed from electrical substations to neighborhoods at 1.6×104 v . this is a 60 hz oscillating (ac) voltage. neighborhood transformers, seen on utility poles, step this voltage down to the 120 v that is delivered to your house. part a how many turns does the primary coil on the transformer have if the secondary coil has 140 turns? express your answer using two significant figures. n prim n p r i m = nothing turns submitrequest answer part b no energy is lost in an ideal transformer, so the output power p out from the secondary coil equals the input power p in to the primary coil. suppose a neighborhood transformer delivers 230 a at 120 v . what is the current in the 1.6×104 v line from the substation? express your answer using two significant figures. i i i i = nothing a submitrequest answer provide feedback next
what do the notation's look like?
i would think by taking all the water out and storing it somewhere else and filtering it or cleaning it then put it back
efficency=useful energy output/total energy input x 100. 2000/3000 x 100 = 66.7%
senators are elected in statewide elections rather than in specific districts. (d)