A star's absolute magnitude is its apparent brightness as seen from
A) 10 parsecs distance.
B) 100 parsecs distance.
C) Pluto.
D) Alpha Centauri.
E) 10 light-years distance.
A
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A hunter on level ground fires a bullet at an angle of 10 degrees above the horizontal while simultaneously dropping another bullet from the level of the rifle. Which bullet will hit the ground first?
A) the one dropped B) the one fired C) both hit at the same time.
If a nuclide has a half-life of 100 s, what is the corresponding mean lifetime?
A. 100 s B. 144 s C. 69 s D. 50 s E. 75 s
A plastic rod is rubbed with fur. The rod is then touched to the metal knob of an electroscope. The sign of the charge on the electroscope after contact is ________.
Fill in the blank(s) with the appropriate word(s).
How does the equilibrium rule, ?F = 0, relate to Newton's first law of motion?
What will be an ideal response?