A ball is thrown upward with a speed and direction such that it reaches a maximum height of 16.0 m above the point it was released. At its maximum height it has a speed of 18.0 m/s. With what speed was the ball released?
A) 25.3 m/s
B) 22.2 m/s
C) 33.0 m/s
D) 29.2 m/s
E) 36.9 m/s
A
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The Tharsis Bulge on Mars is roughly the size of:
A) Mexico. B) Asia. C) Texas. D) North America. E) New York City.
A champion athlete can produce one horsepower (746 W) for a short period of time. The number of 16 cm high steps a 70 kg athlete could ascend in one minute while expending one horsepower is
a. 4. b. 7. c. 65. d. 408. e. 4 567.
Total internal reflection
A. Accounts for the brilliance of cut diamonds. B. Allows light to travel in a curved path inside an optic fiber. C. All of these are true. D. Occurs when light strikes an interface at greater than the critical angle.
The top of the stratosphere is called the
a. stratopause. b. tropopause. c. mesopause. d. thermopause.