Recent content by yesgirl10

Okay, thanks everyone for the feedback! Really appreciate it. :)

Hi everyone, I just have a question about the correct procedure to follow to complete a question. The question is: A source of frequency of 60 Hz is used to make waves in a rope 3.0m long. It takes 0.10 s for the waves to travel from one fixed end of the rope to the other. How many loops are...

Okay, thank you!

I'm really confused, sorry. :frown: Where did the 30 come from? And I worked it out by doing 0.48V/0.06A. Did I do that part wrong?

Oh okay, so everything is alright then? And I am not sure about the check. I know that P=V^2/R as well as P=V(I). So to find the power for the whole circuit I used the total values and both equations gave me the same answer.

pictures Here are the pictures.

Homework Statement Hi, I just need some confirmation on this question on whether it is correct or not. Homework Equations P= V^2/R. Based on that circuit I was asked to complete the following table and then find the power of the circuit. The Attempt at a Solution To find power I did the...

Thank you so much for your help! :) And yes that is what they gave me. Thanks again!

Thanks for the reply! Ohh ok this is making sense, so since Q=83500J and the heater is giving out 70W or 70J/s I did 83500/70 which gave me approximately 1178.6 seconds for the ice cube to completely melt. Right?

Is that correct?

Oh, woops. Well Δt=t2-t1, so final temp-initial temp I believe. So does that mean that Δt is actually -10-(-30)?

I think it's the final temp.

Like this?

How do I fix it?

1. A 0.25kg piece of ice at -30°C is warmed by an electric heater and the following graph of the temperature is produced (I just redrew the graph). Assume that there has been no loss of energy to the surroundings. a) use the information on the graph to determine the power output of the heater...