What is the Stefan-Boltzmann constant?
What will be an ideal response?
The Stefan-Boltzmann constant is the parameter that, when multiplied by the
fourth-power of the absolute temperature of a surface, predicts the total
thermal radiation emitted from the surface for a unit area.
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Which statement best describes what used to be called the solar neutrino problem?
A) Theoretical models predict that neutrinos should be produced in the Sun, but no neutrinos had ever been observed to be coming from the Sun. B) Solar neutrinos were detected in fewer numbers than predicted by theoretical models. C) Theoretical models did not predict the production of neutrinos by the Sun, yet solar neutrinos were detected. D) Theoretical models predicted that all solar neutrinos should be destroyed before they arrive at Earth, yet neutrinos were detected on Earth. E) The neutrinos that were being detected from the Sun had much smaller masses than theoretical models could account for.
What would the Venus "no greenhouse" temperature be if its clouds were more transparent, giving a reflectivity the same as Earth's?
A loop-like bend in a river channel is called a(n) ______________
Fill in the blank(s) with correct word
A pendulum is made by letting a 2.0-kg object swing at the end of a string that has a length of 1.5 m. The maximum angle the string makes with the vertical as the pendulum swings is 30°. What is the speed of the object at the lowest point in its trajectory?
a. 2.0 m/s b. 2.2 m/s c. 2.5 m/s d. 2.7 m/s e. 3.1 m/s