Virtually nothing, I think. I'm not a physicist but 7.5×10^14 eV converts to 120 microjoules. Wikipedia says that one Joule is the energy in a tennis ball movin

Virtually nothing, I think. I'm not a physicist but 7.5×10^14 eV converts to 120 microjoules. Wikipedia says that one Joule is the energy in a tennis ball moving at 23 km/h (14 mph). Another comparison I've heard is that a joule is about the energy in a strong handclap. This would be about a ten-thousandth of that. Wolfram Alpha also gives the helpful comparison "0.06 times the mechanical work done pressing a key on a keyboard" so if that helps? http://www.wolframalpha.com/input/?i=7.5%C3%9710%5E14+eV+to+joules http://www.wolframalpha.com/input/?i=7.5%C3%9710%5E14+eV+to+...