(2005? One day, the staff of the property management company came to Xiaoming's house to collect the electricity bill. Xiao Ming observed the situation of the watt-hour meter as shown in the figure, a

(2005? One day, the staff of the property management company came to Xiaoming's house to collect the electricity bill. Xiao Ming observed the situation of the watt-hour meter as shown in the figure, and then found it out from the notebook. (1) electricity consumption this month W= 1974.5kw? h- 1858？ 5kw？ h= 1 16kw？ h； Xiao Ming's family has to pay 1 16kw electricity this month? H×0.6 yuan /kw? H=69.6 yuan;

So the answer is: 69.6.

(2)“220v？ 100W "bulb works normally 1min = pt = 0.1kw×160h =1600kw? h；

So the turntable of the watt-hour meter rotates n=3000R/kw? h× 1600kw？ h = 5R

So the answer is: 5.

(3) Use a stopwatch to record the revolutions of the electric energy meter when the TV is connected to the circuit alone, and then use the formula W=Pt to calculate the consumed electric energy. Comparing the two, we can draw a conclusion.