00:01
For the first part, we need to find the cost to operate motor for 5 hours.
00:14
Which is equal to c equals to the energy multiplied the cost per kwh.
00:22
Here the cost per kwh is given 0 .06 dollars.
00:30
And for the energy, we know energy is equal to input power multiplied time.
00:36
Where t is equal to 5 hours.
00:41
And for the input power, which is p in is equal to voltage multiplied current.
00:48
And in the question, voltage is given 140 volts and current is equal to 1 .78 amperes.
00:56
From here we get our input power is equal to 249 .2 volts.
01:02
And our energy will be equal to the input power multiplied time.
01:10
Which is equal to 249 .2 multiplied 5.
01:15
Which is equal to 1 .246 kwh...