you did divide by 1000 W/kW, but the problem asks for the answer to the nearest tenth (nearest dime).GlobalDuty said:Homework Statement
Compute the cost per day of operating a lamp that draws a current of 1.90 A from a 110 V line. Assume the cost of energy from the power company is $0.0620 / kWh. NOTE: Enter your response with tenths precision.
The Attempt at a Solution
1.90*110V*.0620*24 = .310992
but this answer is wrong
GlobalDuty said:yeah i divided by 1000 at the end, but .3 is wrong
The cost of operating lamps can be influenced by several factors, including the type of lamp, the wattage, the number of hours used, and the cost of electricity in a particular area. Additionally, maintenance and replacement costs should also be considered.
To calculate the cost of operating a lamp, you will need to know the wattage of the lamp, the number of hours it will be used, and the cost of electricity per kilowatt-hour. Multiply the wattage by the number of hours used, then divide by 1000 to get the number of kilowatt-hours. Finally, multiply this by the cost of electricity per kWh to determine the total cost of operating the lamp.
In general, LED lamps are more cost-effective than incandescent lamps when it comes to operating costs. They use less energy and have a longer lifespan, which can result in lower electricity and maintenance costs in the long run.
There are several ways to reduce the cost of operating lamps. One way is to switch to energy-efficient LED lamps, as they use less energy and have a longer lifespan. Additionally, turning off lamps when not in use and using natural light when possible can also help reduce operating costs.
Apart from the direct costs of electricity and maintenance, there may be hidden costs associated with operating lamps. These can include the cost of replacement bulbs or fixtures, disposal fees for old lamps, and any potential downtime or productivity loss due to lamp failure or maintenance.