What evidence can you find that GCMs are getting better? For example, could the change in the IPCC prediction from 3.0 ± 1.5 °C to 1.4 °C to 5.8 °C be considered an improvement? Explain
What will be an ideal response?
The change does represent an improvement in the prediction because it clearly
treats the upper and lower ends of the range differently. This is due to changes in the
models that give them greater believability, in particular improvements in the ocean
atmosphere interface and a substantial increase in the number of grid volumes used in the
calculations.
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Evidence gathered from observations of exoplanets indicates approximately what percentage of stars have planets?
A) 0 B) 1 C) 10 D) 100 E) It is not yet possible to make an estimate.
When a single slit that is 0.050 mm wide is illuminated by light of 550-nm wavelength, what is the angular separation between the first two minima on one side of the central maximum?
A) 0.36° B) 0.47° C) 0.54° D) 0.63° E) 1.3°
A satellite is placed in a geosynchronous orbit. In this equatorial orbit with a period of 24 hours, the satellite hovers over one point on the equator. Which statement is true for a satellite in such an orbit?
a. There is no gravitational force on the satellite. b. There is no acceleration toward the center of the Earth. c. The satellite is in a state of free fall toward the Earth. d. There is a tangential force that helps the satellite keep up with the rotation of the Earth. e. The force toward the center of the Earth is balanced by a force away from the center of the Earth.
Which of the following wavelength regions cannot be studied at all with telescopes on the ground?
A) radio B) infrared C) x-rays D) both radio and x-rays E) both infrared and x-rays