subject
Engineering, 05.11.2019 01:31 jillianbarnes2565

Electric power is often used to generate heat. you might use an electric kettle to heat up 12 ounces of water for a mug of tea. water has a very high heat capacity, so this uses a lot of energy. we can use the specific heat of water (cwater = 4186 j/kgºc) to calculate the total energy e required to heat the water: e = cmδt, where c is specific heat, m is the mass of water, and δt is the change in temperature. assume that the water starts at room temperature (25 degree c). how much energy (in joules) is required to heat the water to boiling (100 degree c? if the price for electricity is 10.78c/kwh from pacific power in oregon, how many mugs of tea can you make for $1? (assume that water and tea are free, and assume that the water absorbs all of the electric power delivered. note: these are generally unsafe assumptions.) your electric kettle operates at a constant current of 10a and a constant voltage of 120v. how much energy does it consume in five minutes of continuous operation? how many mugs of tea can this heat? how much would this energy cost using the pacific power rate in 2b?

ansver
Answers: 1

Other questions on the subject: Engineering

image
Engineering, 04.07.2019 18:10, qwertylol12345
Different types of steels contain different elements that alter the characteristics of the steel. for each of the following elements, explain what the element does when alloyed with steel.
Answers: 2
image
Engineering, 04.07.2019 18:10, ayoismeisjjjjuan
Manometers are good examples of measuring instruments, nowadays they are not as common as before. a)-capacitive probe gauges b)-gravitational gauges deformation ) gauges d)-digital gauges
Answers: 1
image
Engineering, 04.07.2019 18:10, jojoangelique13
The flow rate of air through a through a pipe is 0.02 m5/s. a pitot static tube is placed in the flow. the radius of the pitot static tube is 1 mm. assuming the flow to be steady and the air to be at 300k, calculate the difference in total and static pressure if the diameter of the pipe is: (a) d 0.1 m d 0.05 m (c) d 0.01 m
Answers: 2
image
Engineering, 04.07.2019 18:20, xcapo1x
Refrigerant-134a enters the compressor of a refrigerator as superheated vapor at 0.14 mpa and -10°c at a rate of 0.05 ka/s and leaves at 0.8 mpa and 50°c. the refrigerant is cooied in the condenser to 0.72 mpa and 26'c. it is then throttled to 0.15 mpa. sketch the t-s diagram for the system and evaluate: 6) the rate of heat removai from the refrigerated space (kw), it) the power input to the compressor (kw), ii) the isentropic efficiency of the compressor (%), and iv) the cop of the refrigerator.
Answers: 2
You know the right answer?
Electric power is often used to generate heat. you might use an electric kettle to heat up 12 ounces...

Questions in other subjects:

Konu
Computers and Technology, 30.06.2019 13:30
Konu
Mathematics, 30.06.2019 13:30
Konu
Mathematics, 30.06.2019 13:30