Coffee Definition and 153 Threads

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...