SI. A physics student has a single-occupancy dorm loom. The student lias a small refrigerator that runs with a current of 3.00 A and a voltage of 110 V, a lamp that contains a 100-YV bulb, an overhead light with a 60-W bulb, and various other small devices adding up to 3.00 W. (a) Assuming the power plant that supplies 110 V electricity to the dorm is 10 km away and the two aluminum transmission cables use 0-gauge wire with a diameter of 8.252 mm, estimate the percentage of the total power supplied by the power company that is lost in the transmission, (b) What would be the result is the power company delivered the electric power at 110 kV?
SI. A physics student has a single-occupancy dorm loom. The student lias a small refrigerator that runs with a current of 3.00 A and a voltage of 110 V, a lamp that contains a 100-YV bulb, an overhead light with a 60-W bulb, and various other small devices adding up to 3.00 W. (a) Assuming the power plant that supplies 110 V electricity to the dorm is 10 km away and the two aluminum transmission cables use 0-gauge wire with a diameter of 8.252 mm, estimate the percentage of the total power supplied by the power company that is lost in the transmission, (b) What would be the result is the power company delivered the electric power at 110 kV?
SI. A physics student has a single-occupancy dorm loom. The student lias a small refrigerator that runs with a current of 3.00 A and a voltage of 110 V, a lamp that contains a 100-YV bulb, an overhead light with a 60-W bulb, and various other small devices adding up to 3.00 W. (a) Assuming the power plant that supplies 110 V electricity to the dorm is 10 km away and the two aluminum transmission cables use 0-gauge wire with a diameter of 8.252 mm, estimate the percentage of the total power supplied by the power company that is lost in the transmission, (b) What would be the result is the power company delivered the electric power at 110 kV?
Every day a certain household uses a 3,3 kW electric stove for 72 minutes, six
6 hours each and miscellaneous appliances amounting to 1,6 kW h. The 3 kW hot w
ninutes during the day. If electricity costs 35 c a kWh
An 11.0-W energy-efficient fluorescent lightbulb is designed to produce the
same illumination as a conventional 40.0-W incandescent lightbulb.
Assuming a cost of $0.116/kWh for energy from the electric company, how
much money does the user of the energy-efficient bulb save during 200 h of
use? (Give your answer to the nearest cent.)
You and your housemate have an argument over the cost of the electric bill.
You want to turn off the outside porch light before going to bed each night.
Your housemate wishes to keep the light on from 6:00 PM each evening to
6:00 AM the next morning and says that this will not add any significant
amount to the electric bill. If the porch light bulb is a 65 W bulb, how much
will your housemate's plan contribute to the electric bill each month? Take
the number of days in a month as 30 and the average cost of electricity is
12.9¢/kW · h.
$
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