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I have a Dell Studio, I think its a Studio 1537, or a 1535, think only difference is the processor anyway. But I dont know how to use my bluetooth, I wanna transfer files to and from my phone. Anyone know how?

I was wondering if anyone knows what sort of voltage is generated by cyclists to power lamps on their bikes? I was just thinking about how much effort is needed from human muscles to produce a certain amount of voltage?

Science in high school will tell you that heat rises, pretty evident. But what happens in space? Without a gravitational field present how does heat dissipate? Do the particles spread out everywhere as its colder in all directions?