Which is the law of reflection?
a. The angle of incidence is the complement of the angle of refraction.
b. The angle of incidence is one-half the angle of refraction.
c. The angle of transmission is equal to the angle of incidence.
d. The angle of incidence equals the angle of reflection.
e. The angle of incidence is twice the angle of reflection.
d
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An 80.0 kg climber climbs to the top of Mount Everest, which has a peak height of 8848 m. What is the climber’s potential energy with respect to sea level?
How much power does a sphere with a radius of 10 cm radiate into empty space if is has an emissivity of 1.0 and is kept at a temperature of 400 K? (? = 5.67 × 10-8 W/m2 ? K4)
A) 60 W B) 70 W C) 180 W D) 210 W E) 360 W
Heat is applied to an ice-water mixture to melt some of the ice. In this process
a. work is done by the ice-water mixture. b. the temperature increases. c. the internal energy increases. d. all of the above are correct.
A string on a guitar is stretched between two points 30.0 cm apart with a tension of 100 N. The mass/length of the string is 0.00300 kg/m. The frequency of the mode of vibration with the lowest frequency is
A. 304 Hz. B. 350 Hz. C. 376 Hz. D. 415 Hz. E. 433 Hz.