Draw and label a simple diagram of the following: a. a refracting telescope b. a reflecting telescope
What will be an ideal response?
Diagrams should look similar to Figures 6.9 and 6.10 in the text.
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This photo shows a slice of a meteorite. What is its significance?
A) The shiny metal flakes embedded in rock are just what we expect if condensation really occurred as the nebular theory predicts. B) It shows that accretion really did make objects many kilometers in size during the early stages of the formation of our solar system. C) The surprisingly flat face of the meteorite indicates that the solar nebula must have been hot in the region in which this meteorite formed. D) The structure and composition of the meteorite show that material that condensed beyond the frost line really did differ from material that condensed within the frost line.
A bullet train moving in the +x direction with x-velocity ? relative to the ground has lights on the roof of the head and tail cars that blink simultaneously in the train frame. The head car’s light happens to be passing by an observer on the ground just as it blinks. The observer sees the light from the tail car at a different time, but after correcting for the light travel time from the tail car, the observer concludes that in the ground frame
A. The tail car’s light blinked before the head car’s light. B. The head car’s light blinked before the tail car’s light. C. Both lights blinked simultaneously. D. One cannot determine unambiguously which event occurs first in the ground frame.
An automobile traveling along a straight road increases its speed from 30.0 m/s to 50.0 m/s in a distance of 180 m. If the acceleration is constant, how much time elapses while the auto moves this distance?
A. 6.00 s B. 4.50 s C. 3.60 s D. 4.00 s E. 9.00 s
A cluster with a lot of Type O and B stars, but no bright K or M stars, is very
A) faint. B) poor in heavy elements. C) young. D) old. E) densely packed.