A star has a parallax of 0.01 arc seconds. Its distance is
A) 1 parsec. B) 0.01 parsecs. C) 10 parsecs D) 0.1 parsecs. E) 100 parsecs.
E
You might also like to view...
A planet is orbiting a star. Which of the following statements is true for the acceleration and gravitational forces in this situation?
A) The acceleration of the planet is much more than the acceleration of the star, and the gravitational force on the planet is much more than the gravitational force on the star. B) The acceleration of the planet is much more than the acceleration of the star, but the gravitational force on the star is the same but opposite the gravitational force on the planet. C) The gravitational force on the star is much smaller than the gravitational force on the planet, but the accelerations are equal and opposite.
Relate sunspots and prominences
What will be an ideal response?
The oldest known elements in the periodic table are the ones with
A) the lowest atomic numbers. B) the highest atomic numbers. C) odd looking atomic symbols. D) atomic symbols that match their modern names.
A shell explodes into two fragments, one fragment 25 times heavier than the other. If any gas from the explosion has negligible mass, then
A) the momentum change of the lighter fragment is exactly the same as the momentum change of the heavier fragment. B) the momentum change of the heavier fragment is 25 times as great as the momentum change of the lighter fragment. C) the momentum change of the lighter fragment is 25 times as great as the momentum change of the heavier fragment. D) the kinetic energy change of the heavier fragment is 25 times as great as the kinetic energy change of the lighter fragment. E) the kinetic energy change of the lighter fragment is 25 times as great as the kinetic energy change of the heavier fragment.