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# Which of the following statements regarding this

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Unformatted text preview: 33. A thin lens with focal length f is to be used as a magnifying glass. Which of the following statements regarding this situation is true? a. A converging lens must be used, and the object be placed at a distance greater than 2 from the lens. b. A diverging lens must be used, and the object be placed between f and 2f from the lens. c. A converging lens must be used, and the object be placed at a distance less than f from the lens. d. A diverging lens must be used, and the object be placed at any point other than the focal point. 34. A lens with focal length f=35 cm is used to view a clock 85 cm from the lens. How far from the lens does the clock appear?(select the closest value) a. 120 cm b. 25 cm c. 60 cm d. 50 cm 35. A 100 Watt light bulb is connected to a 120 volt source. What is the resistance of the filament in the bulb (in Ohms)? a. 83.3 b. 144 c. 12000 d. 0.833 36. Find the equivalent capacitance across terminals A and B. That is, find the reading on a capacitance meter placed across terminals A and B of the circuit shown in the figure below. C1 = 3.0 µF, C2 = 3.0 µF, C3 = 10.0 µF a. b. c. d. 16.00 µF 11.50 µF 3.75 µF 37. An oscillator at a frequency of 1.25 Hz will, to two significant figures, make 100 vibrations in a time of a. b. c. d. 125 s 12.5 s 8s 80 s 38. A mass m = 2.0 kg is attached to a spring having force constant k = 300 N/m as shown: The mass is displaced from its equilibrium position and released. Its frequency of simple harmonic oscillations, to three significant figures is: a. 12.3 Hz b. 0.533 Hz c. 0.01 Hz d. 1.95 Hz 39. Two waves with the same frequency and wavelength but different amplitudes are added. If A1 = 2A2 and the waves are 180° out of phase, then the amplitude of the resulting wave will be: a. zero b. same as A1 c. same as A2 d. A1+A2 40. In general, doubling the amplitude of a wave: a. doubles the frequency b. Halves the period c. Quadruples the energy d. doubles the speed 41. Ocean waves with a wavelength of 120 m approach the shor...
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## This note was uploaded on 03/23/2011 for the course CHEM 100 taught by Professor Vallis during the Spring '11 term at Dalhousie.

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