Which of the following are in order of decreasing temperature?
A) O9, F2, F7, G2, K0
B) K0, G2, F7, F2, O9
C) F7, F2, O9, K0, G2
D) O9, F7, F2, G2, K0
A
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The highest frequency visible light is
a. violet. b. red. c. blue. d. green. e. yellow.
That the radio lobes radiate synchrotron radiation indicates that
a. high speed electrons are spiraling through a magnetic field. b. the source of the radio jets must be a black hole. c. the source of the radio energy is rotating rapidly. d. the central galaxy must be a giant elliptical galaxy. e. the central galaxy must rotate about two nearly perpendicular axes.
Structure 1 with member BC of length L/2 has force P1 applied at joint C. Structure 2 with member BC of length L has force P2 applied at C. Both structures have constant flexural rigidity EI. If the ratio of the applied forces P1/P2 5 5/2, the ratio of the joint B reactions RB1/RB2 is approximately:
(A) 1
(B) 5/4
(C) 3/2
(D) 2
According to Wien's Law, a(n) ____
a. hotter object will emit more short wavelength (bluer) radiation b. hotter object will emit more long wavelength (redder) radiation c. cooler object will produce less photons d. cooler object will produce more photons e. object will produce the same number of photons at different temperatures