The spectral lines of a star indicate ionized helium is prominent, yet the star appears orange in color. Explain the problem with this and offer an explanation
What will be an ideal response?
Ionized helium is found only in O type stars, which should be blue-white in color; if the star appears orange, it must lie behind a thin dust cloud that is absorbing and scattering most of the shorter wave radiation that the star is sending into space; the star would, therefore, appear much blue and brighter if not for the dust cloud.
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For the plan view shown in the figure, determine the mean radiant temperature at the location shown.
If the temperature of the bubble described in problem T7T.8 was 320 K when it formed, what is its approximate final temperature when it reaches the surface?
A. 40 K B. 80 K C. 320 K D. 1280 K E. 2560 K F. Other (specify)
If you are driving at 30 miles per hour and increase your speed to 60 miles per hour, you quadruple your kinetic energy
Indicate whether the statement is true or false
The weak force that acts between an electron and a quark is caused by the exchange of
a. photons. b. gluons. c. gravitons. d. W+, W–, or Z0 bosons.