1. In one of Thompson's experiments he placed a thin metal foil in the electron beam and measured its temperature rise. Consider a cathode-ray tube in which electrons are accelerated through a 2,000 V potential difference, then strike a 10 mg copper foil. How many electrons strike the foil in 10 s, if the foil temperature rises 6.0 C? 2. r = (mv)/(qB) v = E/B 3. I am really kind of at a loss as to how to set up this...I am not sure I am in the right track, and I don't know if there is an equation that relates temperature with electricity, I am sure there is and if there is I would like to be pointed to it, I think that's really all I need, unless I am completely doing the wrong thing :/ Thanks guys (that includes females :] ).