Recent content by EMEE_

But I'm just hesitating what formulas to use. How can I calculate the voltages right?

The current flows clockwise, doesn't it? When moving in the direction of the electric current, the potential increases in the batteries but decreases in the resistors. Am I right?

I also know that the voltage of A is 0V.

Hi. I have physics homework that I don't understand. Hopefully, someone here can give me some advice. So, the homework goes like this: Draw an electric circuit potential graph and find out the potential difference between points B and C. The two resistors have equal values. Believe me or...

So the area and ratio are given ( 3:2) and 3 represents the long side and 2 the shorter side. I calculate the area like this: A = L * W ( L is the length and W is the width). I think that the perimeter is 2*W+2*L

How am I supposed to calculate this?

Hi. Could someone please help me with this? : A rectangle has a ratio of 3:2. The area is 294 dm2. What is the perimeter?

Yeah, thanks, that might help. But I don't really know what formulas/ equations I should use... Could you please help with those?

Ok, good if the calculation is correct! :). But I don't actually know how to go from there to the time required...

I'm just supposed to bring it to a boil.

Hi. I have been trying to solve the following problem:How long will it take to boil 1 liter of water from 20°C? The heat efficiency / η is 85% , voltage / U 230V and power / P 200W. The answer must be given in seconds. So, t1 = 20°C t2 = 100°C Δt = 80°C V = 1,0 liter → m = 1,0 kg...