The different colors of the spectrum
A) are sharply divided.
B) blend from one to another.
C) differ from the colors of a rainbow.
Answer: B
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The processes of giant-planet migration and the formation of the Oort Cloud caused the Uranus to move both inward and outward in the solar system. Which motion was most important? Why?
What will be an ideal response?
When a damping force is applied to a simple harmonic oscillator which has angular frequency w0 in the absence of damping, the new angular frequency w is such that
a. w < w0. b. w = w0. c. w > w0. d. wT < w0T0. e. wT > w0T0.
The force an ideal spring exerts on an object is given by Fx = -kx, where x measures the displacement of the object from its equilibrium (x = 0) position. If k = 60 N/m, how much work is done by this force as the object moves from x = -0.20 m to x = 0?
a. -1.2 J b. +1.2 J c. +2.4 J d. -2.4 J e. +3.6 J
An 80-g aluminum calorimeter contains 380 g of water at an equilibrium temperature of A piece of metal, initially at is added to the calorimeter. The final temperature at equilibrium is 32°C
Assume there is no external heat exchange. The specific heats of aluminum and water are 910 J/kg ? K and 4190 J/kg ? K, respectively. The specific heat of the metal is closest to A) 520 J/kg ? K. B) 480 J/kg ? K. C) 390 J/kg ? K. D) 350 J/kg ? K. E) 560 J/kg ? K.