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# CAPA X - Nicholas Charles Miller PHY183 Spring 2010 Physics...

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Nicholas Charles Miller - PHY183, Spring 2010 - Physics for Scientists and Engineers I 1 Homework Set 10 Wire Stretch A mass of 48 kg is suspended from a steel wire of diameter 0.5 mm and length 0.8 m. How much does the wire stretch in mm? Young’s modulus for steel is 2.0 x 10 11 N/m 2 . You are correct. Your receipt is 156-4211 Change in Volume What is the change in volume (in cubic meters) of a quantity of sea water at a depth of 970 m, if its volume was 1 cubic meter at the ocean surface? Hint: The density of sea water is 1070 kg/m 3 , and the bulk modulus is 2.3 · 10 9 N/m 2 . Don’t forget the sign! You are correct. Your receipt is 156-2771 Minimum Force A syringe with a plunger of diameter 1.9 cm is attached to a hypodermic needle with a diameter of 2.5 mm. What minimum force (in N) must be applied to the plunger to inject into a vein where the pressure is 18 torr above atmospheric pressure. You are correct. Your receipt is 156-1602 Density A piece of moon rock reads 35.8 grams on a scale when in air, but 9.8 grams in alcohol (specific gravity = 0.79). What is the density of the moon rock in kg/m 3 ?

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