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Test on Circular Motion-Friday

Test on Circular Motion-Friday. Begin your study guide….5+ points. What is a centrifuge?. It is a piece of equipment that puts objects into rotation Used to separate the different parts of blood DNA Uranium enrichment U-238 to get U-235 the fat from milk. Human centrifuge.

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Test on Circular Motion-Friday

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  1. Test on Circular Motion-Friday • Begin your study guide….5+ points

  2. What is a centrifuge? • It is a piece of equipment that puts objects into rotation • Used to separate the different parts of blood • DNA • Uranium enrichment U-238 to get U-235 • the fat from milk

  3. Human centrifuge • The use of large centrifuges to simulate a feeling of gravity has been proposed for future long-duration space missions. • Exposure to this simulated gravity would prevent or reduce the bone deterioration and  muscle atrophy that affect individuals exposed to long periods of freefall. [

  4. Artificial Gravity

  5. Simulated Gravity • Just like the gravitron…a rotating object will be pressed to the outer wall, inertia simulates (feels like) gravity

  6. Simulated Gravity • The speed of the rotation controls the amount of “artificial gravity” • http://www.youtube.com/watch?v=JH8FiW1_hjs

  7. How many g’s do we experience on Earth?

  8. Most people cannot tolerate rotating more that 3 rpm • Small structures would have to rotate very fast to create 1 g • Most people can’t tolerate fast rotations…3 rpm (max) • Sooo…to get 1 g at 1 rpm would need a very large structure ..2 km in diameter

  9. The farther away from the center the more g’s (centripetal accel)

  10. Review • What is a piece of equipment that puts objects into rotation? • What is the purpose of a human centrifuge? • How is gravity simulated? • Centrifuge • To simulate (make it feel like) gravity • Revolve a spaceship

  11. Review • Would a space station need to be a certain size? • Why is such a large structure needed for a space station? • Is there a place on the space station where you would experience 0.5g? • Yes, it will have to be at least 2 km across • To decrease the # rpm • ½ way to the center

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