nagle_phys2020_fa07_lecture26

nagle_phys2020_fa07_lecture26 - Quick Review of the three...

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1 96 • New CAPA assignment for next week now available • Finish reading Chapter 20 • Next week we will start on Electromagnetic Induction Chapter 21 • The advanced notes on this topic are now posted (Set 7) 97 Quick Review of the three right hand rules to date…. 1. Vector Cross Product 2. Magnetic Field Direction (fingers curling) from a wire with current i (thumb) 3. Fingers along current loop, thumb in direction of the Magnetic Field i 98 How does a rail gun work? Projectile Conducting Gas i X B B L i F v v v × = 99 Rail Guns are by far the most spectacular type of electromagnetic accelerators ever developed. They hold the record for fastest object accelerated of a significant mass, for the 16000m/s firing of a .1 gram object by Sandia National Research Laboratories' 6mm Hypervelocity Launcher, and they can also propel objects of very sizeable masses to equally impressive velocities, such as in the picture to the left, where Maxwell Laboratories' 32 MegaJoule gun fires a 1.6 kilogram projectile at 3300m/s (that's 9 MegaJoules of kinetic energy!) at Green Farm
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nagle_phys2020_fa07_lecture26 - Quick Review of the three...

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