Monochromatic light is incident on a grating that is 75 mm wide and ruled with 50,000 lines. The second-order maximum is seen at 32.5°. What is the wavelength of the incident light?
A) 202 nm
B) 403 nm
C) 452 nm
D) 605 nm
E) 806 nm
B
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The effect of de-forestation on the global warming problem is that
A) this makes the problem worse, because trees consume ozone from the atmosphere. B) this actually helps solve the problem, because trees consume ozone from the atmosphere. C) this actually helps solve the problem, because trees consume carbon dioxide from the atmosphere. D) this has no effect on the global heating problem, although it has harmful effects in other ways. E) this makes the problem worse, because trees consume atmospheric carbon dioxide.
Mass on a Spring: A 2.0-kg block on a frictionless table is connected to two springs whose opposite ends are fixed to walls, as shown in the figure. The springs have force constants (spring constants) k1 and k2. What is the oscillation angular frequency of the block if k1 = 7.6N/m and k2 = 5.0 N/m?
A. 2.5 rad/s B. 3.5 rad/s C. 0.40 rad/s D. 0.56 rad/s
A 1938 nickel has a diameter of 21.21 mm, a thickness of 1.95 mm, and weighs 0.04905 N. What is its density?
A) 1.37 × 10-4 kg/m3 B) 1.82 × 103 kg/m3 C) 19.3 × 103 kg/m3 D) 3.63 × 103 kg/m3 E) 7.26 × 103 kg/m3
Near the earth the intensity of radiation from the Sun is 1350 W/m2. What volume of space in this region contains 1.0 J of energy?
A) 4.5 × 10-6 m3 B) 3.3 × 102 m3 C) 7.4 × 10-4 m3 D) 1.4 × 103 m3 E) 2.2 × 105 m3