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Physics125W99exam3

Physics125W99exam3 - OIIHN ft"L#3 Exam The exam contalns l0...

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OIIHN ft"L The exam contalns l0 muldple choice problems and 4 pardal credlt problems Muldple choice problems ere worth 5 potnts epiece. Polnt values for pardd credlt problems are llstcd on eech problem. You have 90 minutes for tbe exam and you may user cdculator. This is exam form #3 MC (of50) b Problem ll (of l0) L4 Problem 12 (of 15) O8 Problem 13 (of 15) ab hoblcm 14 (of l0) oLl Total Scorc (of 1(D) L 5 Exam #3:

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.- l: The radius of the sun is 7xl0tm, and its surface tcmperature is about 5770K. Assuming the emissivity of ,/thc Sun is about0.9, what is thc total power radiated by it? A. l.6rl0Ail B. 3.8xl0t\ff / E. E.2xld3ltr \ ,, la t 2: A4kg mass attachcd to a horizontalspring oscillatcs back and forth with an frequency of l.2Hz. If this mass is replhced by a 2kg mass, what is the ncw frequency of oscillation? r^ tAl r.7 Hz B. 0.85 Hz ' C. 0.6 Hz D. l.2llz E. 0.4H2
3: A 3kg mass oscillatcs on a spring with a 45cm amplitude and a pcriod of 3s. What is the maximum velocity of the mass? A. 0.25mls B. 0.15m/s ' t { i l v- stretches b62,Acm, what is the area of Yre? f: 3:S]ili v F -- '/ /-A t-\ I C. 0.(X2m2 A ' \ L ) 1 ffi JrosN : g,to^N/-^, 1,o??r \ 4 (th t tDn )

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A. 3.1n/s 5: A large opcn water tank which is Em deep has a hole in it 6m below the surface. What is the speed with which the fluid emergcs from the hole? ?2 16m I '1.10 /j- ' 6, 5 6: A l00kg sign hangs from trvo ropcsattachcd to lt's top corncrs as shown.
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Physics125W99exam3 - OIIHN ft"L#3 Exam The exam contalns l0...

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