When white light illuminates a green leaf, ________________ are the two colors of light that are mainly absorbed.
a. Blue and Yellow
b. Green and Yellow
c. Green and Red
d. Red and Blue
Ans: d. Red and Blue
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In the shear mode II of fracture, the crack propagates _________to the forces that produce the shear stress.
What will be an ideal response?
Seyfert galaxies
a. are more common in close pairs of galaxies than in isolated systems. b. emit more energy at X-ray, ultraviolet, infrared, or radio wavelengths than normal spiral galaxies. c. generally show redshifts greater than 6. d. are more common in close pairs of galaxies than in isolated systems and emit more energy at X-ray, ultraviolet, infrared, or radio wavelengths than normal spiral galaxies. e. are more common in close pairs of galaxies than in isolated systems; emit more energy at X-ray, ultraviolet, infrared, or radio wavelengths than normal spiral galaxies; and generally show redshifts greater than 6.
One light-minute is the distance that light travels in one minute. How far is this, in kilometers? (Recall that the speed of light is 300,000 km/s.)
A) 300,000 km B) 18 million km C) 100 million km D) 1.08 billion km E) 9.46 trillion km
A 4.0-kg mass is placed at (3.0, 4.0) m, and a 7.0-kg mass is placed at (3.0, -4.0) m. What is the moment of inertia of this system of masses about the x axis?
a. 275 kg•m2
b. 90 kg•m2
c. 176 kg•m2
d. 99 kg•m2