All Questions
11
questions
0
votes
0
answers
38
views
Why does the valve symbol have a Clase symbol,or short-circyit symbol before the earth [duplicate]
Could anyone explain to me why the valve symbol have a shortcircuit symbol or termination symbol before the earth???
1
vote
1
answer
100
views
For how long would a 12V 8Ah C20 battery last by heating 100 resistive Kanthal (A1) 20awg 30 cm long wires to 130 ºC in half a second?
Well, I want to heat up 100 wires with 20cm of length each made of Kanthal (A1) with 20 awg gauge (0,8mm/0.03inch diameter and 0.817 ohms/in) to 130 ºC from room temperature of 30 ºC continuously. And ...
- 370
0
votes
2
answers
2k
views
How do I convert generated cooling capacity in kW to kWh?
I have to program a relatively simple program so I can display values on dashboard representing the part kWh a system is responsible for generating. This will be represented as a percentage.
I have a ...
- 1
3
votes
3
answers
1k
views
Where does all the electric energy get dissipated in any electrical system?
I know that some portion of the electrical energy is dissipated as heat due to the efficiency, but where does the other energy go?
If we are talking about a satellite in space, all of the electrical ...
- 139
4
votes
2
answers
238
views
Energy efficiency in an electrical circuit
I’m in high school and we are going to do this laboratory in which we will have to make two solutions at different concentrations and determine which has the greatest electrical resistance in a ...
- 41
1
vote
1
answer
149
views
How is heat generated to start combustion in an incinerator?
I see many diagrams on the internet that show a layout diagram of an incinerator that has a combustion chamber connected to a boiler or gas turbine to capture the energy mechanically or generate ...
- 167
0
votes
2
answers
119
views
How to determine electrical energy and the convert it to heat?
I've been stuck on a problem for quite some time now. I really cannot get my head around it. It's been a while for me, and I just recently been taking up a class again in electrical
engineering. I've ...
- 423
0
votes
1
answer
509
views
Energy is dissipated in the form of heat
I read in the "Lessons in Electric Circuit" book, volume 2:
"One might wonder why anyone would bother with such a thing as AC. It is true that in some cases AC holds no practical advantage over DC. In ...
- 23
25
votes
9
answers
4k
views
Is a microwave's output power proportional to the mass of its contents?
My friend and I are having a heated debate.
On the one hand, he thinks that a microwave oven that is empty, consumes almost no power (not considering lights, lcd, etc). He says that once you put an ...
- 476
0
votes
1
answer
306
views
What is the efficiency of electric power converted to heat?
I'm trying to understand how much heat is generated when a given amount of electric power is drawn. And from what I understand, it's pretty much 1 to 1 isn't it?
Example: If I have a 1 HP motor ...
- 901
1
vote
2
answers
493
views
How and where is energy dissipated in a driven traction motor?
When a fully loaded elevator is moving down its potential energy is decreased and I guess is somehow converted by the elevator traction motor into heat.
How exactly does it happen? What exact ...
- 12.5k