Recent content by tup

yea, i asked my teacher and the answer was printed wrong. thanks guys.

Homework Statement An electron in the beam of a typical television picture tube is accelerated through a potential difference of 2.0*10^4 V before it strikes the face of the tube. What is the energy of this electron, in electron volts, and what is its speed when it strikes the screen...

thx so much for the reply basically, we obtain the rate of temp changes from the data, so according to our hypothesis, the larger the surface area the higher of the rate, right? but the thing is, one of our trial, the one with the largest beaker, is really screwed up. the rate of that one is...

ok, this is more of a question of theory than actual calculation. Me and my friends did a physics lab on heat transfer vs. surface area of contact. We used water and oil (since oil will float above the water and creating a surface of contact). We heated the water to ~50 degrees C and oil was...