Electromagnetism Help: Get Unstuck Now!

  • Thread starter Thread starter butterflycandy
  • Start date Start date
  • Tags Tags
    Electromagnatism
AI Thread Summary
The discussion revolves around a request for help with an electromagnetism problem related to power consumption of an appliance when switching from a 120 V outlet in Canada to a 240 V outlet in the UK. Participants emphasize the importance of showing effort in problem-solving before receiving assistance. The original problem statement was edited by the original poster, leading to confusion and a lack of clarity in the discussion. The thread ultimately concludes without a resolution due to the missing information and the OP's decision to edit their post. The conversation highlights the necessity of adhering to homework guidelines for effective assistance.
butterflycandy
Messages
1
Reaction score
0
Homework Statement
nevermind
Relevant Equations
V=IR
Completely lost :(
 
Physics news on Phys.org
This may be difficult to answer without more info.
 
me too. what's your question?
 
hutchphd said:
This may be difficult to answer without more info.
DaveE said:
me too. what's your question?
When I first replied, there was a problem statement about an electrical appliance that consumes 800 W when connected to a 120 V outlet in Canada. The question was how much power it would consume in the UK where the outlets are 240 V. There were five choices, all in kW, which I don't remember except for the correct one which can be easily reconstructed and "zero" which means that Canadian appliances in the UK would be useless.

It seems that OP replaced the statement of the problem with "nevermind", but the post was not stamped as having been edited. Oh well.
 
  • Like
Likes berkeman and hutchphd
Yeah, he edited it right away, so there is no "History" link in his post that I can see. Thread is closed.
 
  • Like
Likes kuruman
I multiplied the values first without the error limit. Got 19.38. rounded it off to 2 significant figures since the given data has 2 significant figures. So = 19. For error I used the above formula. It comes out about 1.48. Now my question is. Should I write the answer as 19±1.5 (rounding 1.48 to 2 significant figures) OR should I write it as 19±1. So in short, should the error have same number of significant figures as the mean value or should it have the same number of decimal places as...
Thread 'A cylinder connected to a hanging mass'
Let's declare that for the cylinder, mass = M = 10 kg Radius = R = 4 m For the wall and the floor, Friction coeff = ##\mu## = 0.5 For the hanging mass, mass = m = 11 kg First, we divide the force according to their respective plane (x and y thing, correct me if I'm wrong) and according to which, cylinder or the hanging mass, they're working on. Force on the hanging mass $$mg - T = ma$$ Force(Cylinder) on y $$N_f + f_w - Mg = 0$$ Force(Cylinder) on x $$T + f_f - N_w = Ma$$ There's also...
Back
Top