Extra credit 01

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hoe (wh4655) – extra c redit 01 - - Turner - - (58220) 1 This print-out should have 9 questions. Multiple-choice questions may continue on the next column or page – fnd all choices beFore answering. 001 10.0 points When an object Falls through air, there is a drag Force ( with dimension M · L / T 2 ) that depends on the product oF the surFace area oF the object and the square oF its velocity; i.e. , F air = C A v 2 , where C is a constant. What is the dimension For constant C ? 1. [ C ] = M T · L 2 2. [ C ] = T · L 2 M 3. [ C ] = T · L M 4. [ C ] = M L 3 5. [ C ] = M L 2 6. [ C ] = T 2 · L 2 M 7. [ C ] = M T 2 · L 2 8. [ C ] = T 2 · L M 9. [ C ] = M T 10. [ C ] = T M 002 10.0 points A cylinder, 16 cm long and 4 cm in radius, is made oF two di±erent metals bonded end-to- end to make a single bar. The densities are 4 . 6 g / cm 3 and 6 g / cm 3 . 16 cm 4 cm , radius What length oF the lighter-density part oF the bar is needed iF the total mass is 4375 g?
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