Language: 
To browser these website, it's necessary to store cookies on your computer.
The cookies contain no personal information, they are required for program control.
  the storage of cookies while browsing this website, on Login and Register.

GDPR and DSGVO law

Storing Cookies (See : http://ec.europa.eu/ipg/basics/legal/cookies/index_en.htm ) help us to bring you our services at overunity.com . If you use this website and our services you declare yourself okay with using cookies .More Infos here:
https://overunity.com/5553/privacy-policy/
If you do not agree with storing cookies, please LEAVE this website now. From the 25th of May 2018, every existing user has to accept the GDPR agreement at first login. If a user is unwilling to accept the GDPR, he should email us and request to erase his account. Many thanks for your understanding

User Menu

Google Search

Custom Search

Author Topic: few general formulas  (Read 6321 times)

Offline nix85

  • Hero Member
  • *****
  • Posts: 1148
Re: few general formulas
« Reply #30 on: April 03, 2021, 02:11:29 PM »
again you are not getting it, just because book
ended in the same location does not mean work
has not been done. you used energy to do work
both ways, work has been done. that it's pointless
or useless work is totally irrelevant

Offline lancaIV

  • elite_member
  • Hero Member
  • ******
  • Posts: 5031
Re: few general formulas
« Reply #31 on: April 05, 2021, 12:44:11 PM »
subjective or objective view-point :


https://translate.google.com/translate?sl=auto&tl=en&u=https://de.wikipedia.org/wiki/Arbeit_%28Physik%29


If the direction of the force is not parallel to the direction of the displacement path, only the force component that is parallel to the path is effective.


If the force is perpendicular to the direction of movement, it does no work (an example would be wind pressure acting on a moving train from the side)
.


If the force is anti-parallel to the displacement path, the work done is negative, as in the first example.


If the direction of the force is perpendicular to the path, no physical work is done.


The physical term does not correspond to the everyday understanding according to which every porter is paid for the work they do.

Offline nix85

  • Hero Member
  • *****
  • Posts: 1148
Re: few general formulas
« Reply #32 on: April 05, 2021, 01:57:14 PM »
again you are not getting it, just because book
ended in the same location does not mean work
has not been done. you used energy to do work
both ways, work has been done. that it's pointless
or useless work is totally irrelevant

Offline lancaIV

  • elite_member
  • Hero Member
  • ******
  • Posts: 5031
Re: few general formulas
« Reply #33 on: April 05, 2021, 02:02:13 PM »
You are right,when the positive Joule ,probably vectorical less negative Joule, in the total scalar sum calculation is greater 0,zero !






Sincere


OCWL

Offline nix85

  • Hero Member
  • *****
  • Posts: 1148
Re: few general formulas
« Reply #34 on: April 07, 2021, 06:14:53 PM »
sum is not zero since work has been done
overall energy in the universe is 0 but that is another thing

Offline nix85

  • Hero Member
  • *****
  • Posts: 1148
Re: few general formulas
« Reply #35 on: April 13, 2021, 05:00:14 PM »
another random fact

Offline nix85

  • Hero Member
  • *****
  • Posts: 1148
Re: few general formulas
« Reply #36 on: April 22, 2021, 01:44:34 PM »
another random fact

Miniature Circuit Breaker (MCB) is used for overcurrent and short circuit
protection. it is using electromagnet to break contact for short circuit
and slower, heating bending element made of two different metals
(say copper and steel) to slowly break contact on prolonged overcurrent.
it does not protect people from shock cause it needs big current to activate
while man can die from as little as few dozen miliamps.

for this is used RCD aka FID. it uses a small toroid core with phase and neutral
windings perfectly canceling each other's magnetic field. in a case of slightest
current difference between the two (as in case when grounded man touches live
and some current flows through him back to neutral) magnetic field is produced
and picked up by third winding which instantly trips the switch and man is saved.

https://www.youtube.com/watch?v=oYLIpN4RwEg
https://www.youtube.com/watch?v=Q_bceXFTYnI