Question

SHORT PROBLEMS: Answer the following 3 questions. To receive full credit you must state the correct answer, show any mathematical work, and if appropriate, at least briefly explain your reasoning. 1. The density of a sample of blood is 1,060 kg/m. What is the density of the blood in /g/mun"? Write the answer in scientific notation correct to 3 significant figures. 2. A small sailboat is motoring through the water at 5.0 mph, in a river where a current flows to the northeast (45° north of east) at 2.0 mph. What direction does the boat's captain need to steer the boat to end up going due north? State the correct vector relationship, draw a vector triangle approximately to scale, and appropriately label the three velocity vectors. You DO NOT need to solve the triangle (although you can if you have time). Estimate the boat's heading and answer in a complete sentence. 3. You attach a rock to a string that is 75 cm long and twirl the rock at the end of the string in a horizontal circle over your head so that it takes 1.5 seconds to go around once. What is the magnitude of the rock's centripetal acceleration?

Answer 1

Sol ④ Sblood = 1060 kg m3 } where, lkg clooog S = 1060 X1000 Toll g mms Ima locomm S m3 M = 10-6m = 1060 x 103 x 106 mg/mm3 109 = 1060 ugimm3 Blood = 1:06 x 103 Mg/mm3]