Recent content by sunflowerzz

Yea this was an actual experiment. The measured volume of water was 150 mL and the final volume after the ice was added was 243 mL which gave me 93 mL of ice added. So I used the density of ice to calculate the mass of ice

So I need to add something to my equation or is it all wrong? Since my initial temperature was not warm enough to melt all of the ice does that mean there is no final temperature for the question?

So that means all the added ice didn't melt. So the final product would be a mixture of ice and water. So the temperature that I calculated is just the final temperature of my end product of ice and water.

I'm not sure now?! I mean in the experiment, maybe it does theoretically? What else would I need to consider in my equation then?

Ok since I had to stir the contents until all the ice melted - the final temperature has to be positive then? - I took into account bringing the ice from - 10 to 0 (its melting point), then changing the ice from solid to liquid, and then the water from 0 to the final temperature - this is...

Homework Statement I did an experiment where crushed ice was added to a known volume of warm water and stirred until all the ice melted. My initial water temperature was 40.2°C and the final water temperature was 3.1°C. The known volume of water is 150 mL = 150 g and the melted ice was found...

Is that all the question was asking? Just saying that additional water could have come from the water vapour in the air? That's the only significance? It feels like there should be more to it?!

Homework Statement Background information: I did an experiment trying to support the validity of Charles' Law - we put a plastic dropper in a container and submerged it in salty water and then put it in the freezer. We watched the water level rise in the plastic dropper. The question is...

Ok I got it: (1/2)*(C1 + C2)*V^2 = 3 * (1/2)C1V^2 C1 + C2 = 3C1 C2 = 3C1 - C1 = 2C1 = 2 * 250 = 500 pF Thanks! :)

Do you mean LHS for C2 = C1 + C2?

So for Q25 part a, I just take the value of I1 as 0.858 and not the negative sign? And about the directions: for Q24, the 12 V battery is V = E + Ir because it is in the opposite direction of the current BUT for Q25, The 45 V battery is V = E - Ir because it is in the same direction as the...

Ok so then it's: (1/2)C2V^2 = 3 * (1/2)C1V^2 When you say "add", does this mean C2 will be in parallel with C1? OOH...so if it's parallel, then It's C1 + C2 but is C1 = C2? If it is, then C = C1 + C2 = 250 + 250 = 500 pF But how do you know that both capacitors are 250 pF?

Homework Statement A circuit contains a single 250 pF capacitor hooked across a battery. It is desired to store three times as much energy in a combination of two capacitors by adding a single capacitor to this one. How would you hook it up, and what would its value be? Homework Equations...

But can you tell me why that is?

Homework Statement I've attached the diagrams for both questions Question 24 Determine the terminal voltage of each battery Question 25 a) What is the potential difference between points a and d b) What is the terminal voltage of each battery? Homework Equations V = E - Ir...