A larger-primary lens shows ____________ a smaller-primary lens
a. more detail than
b. less detail than
c. the same amount of detail as
a
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Vision Problems: A little known fact is that both Robinson Crusoe and Friday wore eyeglasses. As it so happens, Robinson Crusoe was farsighted while Friday was nearsighted. Whose eyeglasses did they use whenever they wanted to start a fire by focusing the sun's rays?
A. Robinson Crusoe's B. Friday's C. Both would work equally well. D. Both actually worked, but Friday's was a little bit better. E. Neither's worked, but fortunately they were in possession of matches.
An ambulance is generating a siren sound at a frequency of 2,400 Hz. The velocity of sound is 345.0 m/s. The observer is traveling at a velocity of 24.00 m/s toward the ambulance and the ambulance is traveling at a velocity of 20.00 m/s toward the observer. What is the frequency of the siren perceived by the observer?
A. 2,489 Hz B. 2,560 Hz C. 2,675 Hz D. 2,725 Hz E. 2,830 Hz
Thermal Expansion: An aluminum rod 17.400 cm long at 20°C is heated to 100°C. What is its new length? Aluminum has a linear expansion coefficient of 25 × 10-6 K-1.
A. 17.435 cm B. 17.365 cm C. 0.348 cm D. 0.0348 cm
A 2.0-kg object moving with a velocity of 5.0 m/s in the positive x direction strikes and sticks to a 3.0-kg object moving with a speed of 2.0 m/s in the same direction. How much kinetic energy is lost in this collision?
A. 2.4 J B. 9.6 J C. 5.4 J D. 0.6 J E. 6.0 J