Coffee Definition and 158 Threads

I just now heated a cup of coffee in a microwave oven for 2 minutes. When I opened the oven door to get the cup, the surface of the coffee was placid. But the moment I picked up the cup and moved it, there was a brief moment of boiling lasting maybe one second. What might have caused the...

if you stir a cup of coffee, is the velocity at the centre different from the velocity outside?

I am currently beginning to conduct something like an introductory, very elementary, seminar on string theory at my local institution. The plan is to perform the whole thing in parallel on the web. The lecture notes are being published bit by bit at the String Coffee Table, namely in the...

Here is a problem from a worksheet I have..I'm having a little trouble with it. My teacher neglected to explain most of it: Now, I know everything is done in m/s, so that's 100/9 m/s. I know what the problem is asking and everything..but I don't have any formulas that I can use (I don't...

I'm doing a physics portion of an International Baccalaureate (IB) Group IV project. I'm supposed to prepare a short presentation of the thermodynamics of coffee, and I need things to talk about. IDeas I have so far: -heat dissipation, with and without the cardboard ring, of a cup of...

Ok, I am in conflict. Does a bit of coffee actually help studying by increasing alertness or does it just decrease concentration?? I think I'll just use coffee to stay awake this evening and read all night long or something

You enter a diner and sit down at a booth. The diner is classic Americana... like something from the '50s... but nothing fancy. You read the morning paper and have a smoke as you wait for the waitress dressed in a not-so-clean, pink-and-white-striped, short sleave dress and white leather...

1) A coffe maker which draws 13.5A of current has been left on for 10 min. what is the net number of electrons that have passed thru the coffe maker. [del]Q = I * [del]T = 13.5(600) = 8.1x10^3 I got this wrong, what happened? 2) a battery is rated 12V and 160Amp-hours. How much...