A spaceship traveling at 0.50c away from Earth launches a secondary rocket in the forward direction at 0.50c relative to the spaceship. As measured by Earthlings, how fast is the secondary rocket moving away from Earth?
A) 0.90c
B) 0.50c
C) 0.80c
D) 0.70c
E) c
C
Physics & Space Science
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What is the expression for the transverse velocity of the wave in a string given by 
?
A.
B.
C.
D.
E.
Physics & Space Science
Decreasing the aperture diameter of a camera lens by a factor of three will change the f-number by what factor?
a. 3 c. 1/9 b. 9 d. 1/3
Physics & Space Science
The trajectory of a cannonball fired from a canon depends on
1) the initial velocity. 2) the angle of projection. 3) the effects of air resistance. 4) all of these. When air resistance does affect motion, the cannonball doesn't travel 5) as high. 6) as far. 7) as high and as far.
Physics & Space Science
The lunar maria are ancient _______________ that have apparently covered older, cratered lowlands
Fill in the blank(s) with correct word
Physics & Space Science