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
Absorption of light energy by an electron
A soil surface crust that includes nitrogen-fixing, soil-enriching cyanobacteria.
Light-mantled Albatrosses regularly dive to feed, and can dive to below 12 m.
The Sun as it appears from the surface of Earth before sunset.
Changes in Synaptic Density From Birth to Age 2 Synaptic connections increase throughout the first
Using a vacuum hose and a test light to ground one cylinder at a time on a distributorless ignition ...