Electric plate has three sections with equal resistivity

AI Thread Summary
The electric plate consists of three sections with equal resistivity, functioning in parallel, which allows water to boil in six minutes. When combining the resistivity sections as in configurations A and C, the boiling time for the same weight and initial temperature of water changes. The discussion revolves around calculating the new boiling time based on the altered resistivity arrangement. Participants are encouraged to share their calculations to facilitate further assistance. The focus remains on understanding the impact of resistivity combinations on boiling efficiency.
arcticfridge
Messages
1
Reaction score
0
Physics.jpg

Electric plate has three sections with equal resistivity. Those resistivities combined parallel - water boils per 6 minutes. How much time it will take to boil the same weight and same initial temperature of the water if we will combine resistivities sections like in A and C

Thanks very much
 
Physics news on Phys.org


If you show your attempt someone can help you.
 
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