A sprinter runs 100.0 m. If he travels at constant acceleration of 1.95 
for the first 75.0 m and then at constant velocity for the remaining distance, what was his total elapsed time for the whole race?
A. 11.3 s
B. 9.8 s
C. 10.1 s
D. 10.2 s
D. 10.2 s
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Two projectiles are fired at equal speeds but different angles. One is fired at an angle of 30° and the other at 60°. With no air resistance, the projectile to hit the ground first will be the one fired at
A) 30°. B) 60°. C) both hit at the same time
The color of a star is a measure of its
A) surface temperature B) chemical composition C) mass D) size
A 30-?F capacitor is charged to 80 V and then connected across an initially uncharged capacitor of unknown capacitance C. If the final potential difference across the 30-?F capacitor is 20 V, determine C.
A. 60 ?F B. 75 ?F C. 45 ?F D. 90 ?F E. 24 ?F
What is the mass of the black hole believed to be at the center of the Milky Way? How do we know?
What will be an ideal response?