How much energy do you consume to complete the task

Assignment Help Mechanical Engineering

Reference no: EM13711565

While completing your homework, imagine the study space you are using employs a space heater with a rating of 30 kW, a refrigerator (for snacks) that is rated for 5 kW, and a light fixture with two 100 W bulbs, all operating at a constant rate for the 1.5 hours it takes you to finish.

a. What is the total power consumed at any given moment?

b. How much energy do you consume to complete the task?

c. Assume the utility company charges 6.5 cents per unit of energy in part b, how much did it cost you to complete the assignment?

d. If you were willing to pay the utility company $5, what would be the power rating of an additional appliance you could add to your study space?

Reference no: EM13711565

Questions Cloud

Heat is transferred to the refrigerant such that pressure : A 4.40-ft^3 rigid tank contains saturated refrigerant-134a at 100 psia. Initially, 26 percent of the volume is occupied by liquid and the rest by vapor. A value at the top of the tank is now opened, and vapor is allowed to escape slowly from the tank..

Burning of the fuels and an atmospheric temperature : Two different fuels are being considered for a 1 MW (net output) heat engine which can operate between the highest temperature produced during the burning of the fuels and an atmospheric temperature of 300 K. Fuel A burns at 2,500 K, delivering 50 MJ..

Calculate the work done on the object by the force : A force of F= (-2i+8j-6k)N is applied to an object that is constrained to move in the direction u=0.5571i+0.4481j-0.6992k. If the object has a total displacement of 10 meters in the direction of u, calculate the work done on the object by the force.

Average solar flux incident on a horizontal surface : The yearly average solar flux incident on a horizontal surface in the United States is about 180 W/m2. The average total energy demand in the United States is approximately 100 quads (100 × 1018 ) per year. Assuming an average efficiency of PV cells ..

How much energy do you consume to complete the task : While completing your homework, imagine the study space you are using employs a space heater with a rating of 30 kW, a refrigerator (for snacks) that is rated for 5 kW, and a light fixture with two 100 W bulbs, all operating at a constant rate for th..

Estimate the increase in the price of a barrel of oil : If there were a carbon tax of $250/ton of CO2 on fossil fuels, estimate the increase in the price of a barrel of oil. The density of oil is assumed to be 803 kg/m3. Use C8H18 for oil.

Solar energy collector produces a maximum temperature : A solar energy collector produces a maximum temperature of 100°C. The collected energy is used in a cyclic heat engine that operates in a 5°C environment. Estimate the thermal efficiency if the engine operates at 40% of Carnot efficiency. How would t..

Steady-state conditions with negligible inlet velocity : Air enters a well-insulated turbine operating at steady-state conditions with negligible inlet velocity, 4 MPa, and 100°C. The air expands to an exit pressure of 100 kPa. The exit velocity and temperature are 90 m/s and 100°C, respectively. The diame..

The ratio of mass flow rates of warm to cold air streams : In air-conditioning systems, streams of cold and warm air are mixed to get air with the right temperature. Consider a mixing chamber into which cold air enters at 8C and 100 kPa at a rate of 0.55 m^3 /s and warm air enters at 300C and 100 kPa. The ra..

User Account

All Pages