Light from a 560-nm monochromatic source is incident upon the surface of fused quartz (n = 1.56) at an angle of 30. What is the angle of reflection from the surface?
a. 30
c. 60
b. 75
d. 15
Question 2
An inventor develops a stationary cycling device by which an individual, while pedaling, can convert all of the energy expended into heat for warming water. What minimum power must be generated if 300 g of water (enough for 1 cup of coffee) is to be heated in 10 min from 30C to 90C? (1 cal = 4.186 J, the specific heat of water is 4 186 J/kg C)
a. 9400 W
c. 160 W
b. 590 W
d. 130 W
Model of a sequential study in which two cohorts were followed beginning at age 20. One cohort was f
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