What does better angular resolution mean?
a. astronomical objects look larger
b. astronomical objects look smaller
c. you can see more detail in images
d. you can see fainter objects
e. none of the above
Answer: c. you can see more detail in images
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Suppose we imagine the Sun to be about the size of a grapefruit. How far away are the nearest stars (the three stars of Alpha Centauri)?
A) the length of a football field (100 meters) B) across town C) across the state D) across the United States E) 25,000 miles
A +7.00 ?C point charge and -9.00 ?C point charge are placed along the x-axis at x = 0.000 cm and x = 40.0 cm, respectively
Where must a third charge, q, be placed along the x-axis so that it does not experience any net electric force due to the other two charges? A) -0.200 m B) 2.99 m C) -0.187 m D) -2.99 m E) 0.187 m
If you double the energy content of a kilogram of gas, the temperature of the gas
A. is unchanged B. increases by the square-root of 2 C. doubles D. is multiplied by 4
Components: The magnitude of a vector can never be less than the magnitude of any of its components.
A. True B. False