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The rules, conversion factors, and problems for a physics a exam 5. The exam includes five problems related to physics, such as calculating the buoyant force, mechanical advantage, total force, internal resistance of a battery, and resistance in a circuit. The exam also specifies the points for each problem and the total points for the exam.
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Conversion Factors: 1 mile= 5280 feet (exact) 1 day= 24 hours (exact) 1 km =0.6214 miles 1 year=365.25 days 1 inch= 2.54 cm (exact) 1 hour=60 minutes (exact) 1 gallon =3.785 liters=231 in^3 1 km=1000 meters (exact) 1 slug=14.59 kg 1 foot= 12 inches 1 mile= 1609.3 m 1 parsec=3.26 light-years 1 meter=39.37 inches 1lb=0.454kg 1 cm=0.01meters=10 mm (exact) 1ft=30.48cm 1 minute= 60 seconds (exact) SCORE PROBLEM 1 (15 points) PROBLEM 2 (9 points) PROBLEM 3 (15 points) PROBLEM 4 (17 points) PROBLEM 5 (24 points) TOTAL (80 max) PERCENTAGE OUT OF 80
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5. Four resistors and a 24-V battery are arranged as shown in the circuit diagram. Watch your significant figures! a. Calculate the total resistance of the circuit. (10 points) Ans 96ohms b. Calculate the total current flowing through the circuit. (4 points) Ans 0.25A c. Calculate the current flowing through the 49 resistor, the voltage drop across the 49 resistor, and power dissipated by this resistor. (15 points) Ans .11A,0.61W, 5.6V