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Unformatted text preview: Oregon State University PH 202 Winter Term 2012 Midterm Exam 1 (Wednesday, January 25, 7:00 p.m.) GENERAL DIRECTIONS: Fill out the cover sheet completely , as indicatedincluding your test form letter, which is B. Follow the specifc directions on each page o the answer orm . Use standard SI units unless directed otherwise; use three signifcant digits in all fnal numerical answers. Questions #1-4 are worth 8 points each; #5-7 are worth 10 points each; #8-9 are worth 12 points; #10 is worth 14 points. Physical constants and other possibly useful information V sphere = (4/3) p r 3 V cylinder = p r 2 h V cube = s 3 g = 9.80 m/s 2 1 atm = 1.01 x 10 5 Pa r water = 1000 kg/m 3 r Hg = 13,600 kg/m 3 1. Which statement is true? (A) Archimedes Principle states that the buoyant Force is the uid pressure exerted on the underside oF any part oF any object immersed in that uid. (B) Pascals Principle states that pressure is the same throughout any body oF incompressible uid. (C) Bernoullis equation equates the mechanical energy density oF any two points in a steady ow oF incompressible uid. (D) All oF the above. (E) A and B only. () A and C only. (G) B and C only. (H) None oF the above. 2. Three blocks are placed in a tub (A) Block 2 has the largest buoyant Force acting on it. with water (see bottom oF page). (B) Block 1 must be more dense than block 2. The blocks have volumes V 1 , V 2 (C) Block 1 must have more mass than block 2. and V 3 . Only blocks 1 and 2 oat, (D) All oF the above. and V 1 < V 2 < V 3 . Which is False? (E) A and B only. () A and C only. (G) B and C only. (H) None oF the above. 3. Which statement is true? (A) r gh is a calculation oF gravitational potential energy per unit volume. (B) PV is a calculation oF pressure potential energy. (C) P/A is a calculation oF Force....
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- Winter '08