Recent content by Saska

-Suppose the ice was enclosed in a waterproof sack (that had no mass). Would the total contents of the sack (mass) change when it melted?- yeah ... not the mass, but the volume would change. -- After melting, the ice becomes water, so the vol of the melted ice should be exactly equal to...

I am sorry, I didn't know exactly where to put this. I do believe it has to do with physics but I am not completely sure, so I hope it's OK to place the thread here. If not, I apologize greatly. I had a discussion at school about swimming in various liquids. I came to the conclusion that it...

The second answer confuses me. Isn't ice less denser than water ... So the level should rise?

1) You're sitting in a boat filled with iron, in a pool. What happens with the waterlevel in the pool when you throw out the iron in the pool. Why? Really I don't get this. Either the level is constant, nothing changes, or the level rises? I had a discussion with some classmates and no one...

I don't want an answer, I want a decent discussion about it!

Could someone help me do a comparision between various fuels? I need to know which fuel is the best/worst, seeing this out of a environmental and energy perspective. substance] [combustion] Etanol -1367 kJ/mole Metanol -726 kJ/mole Metan -890 kJ/mole Olja -50 kJ/mole Vätgas -286...

For school I need to know and understand this using enthalpy and enthropy. :) Thanks for the answer. Let me go through it, look up some words in a dictionary and I'll be right back! EDIT: OK I read through your reponse. It makes sense but isn't there much more to it? For exampleI have no...

Can someone help me understand this: By salting the crushed ice, the beer got cold faster. Why?! I have recently studied some Enthalpy, so if anyone could give me an explanation to this using anything related to Enthalpy I'd be very grateful!

OK, I'm not sure i got everything (Remember, english is not my mummy-tongue) I get Newtons law, that's all right. I just don't get if Inertia and his law is the same thing. If it really is the same thing, why have two laws that explain precisely the same thing.(jeez hwo many times did I use...

I'm taking my first Physics course (it's a foreign language), and in English class we were given a piece of paper on Skating taken from an English Physics textbook. We are having problems with some expressions, such as Inertia. What the heck is inertia? Is it a law? Or an expression? (I checked...