A ball thrown vertically from ground level is caught 3.0 s later when it is at its highest point by a person on a balcony which is 14 m above the ground. Determine the initial speed of the ball.
A. 19 m/s
B. 4.7 m/s
C. 10 m/s
D. 34 m/s
E. 17 m/s
Answer: A
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Compared to a 1-kg block of solid iron, a 2-kg block of solid iron has twice as much
A) inertia. B) mass. C) volume. D) all of the above E) none of the above
A river's suspended load and bed load may accumulate at its mouth and form a
a. sea arch. b. guyot. c. delta. d. sea mount.
One of the harmonics of a column of air in a tube that is open at one end and closed at the other has a frequency of 448 Hz, and the next higher harmonic has a frequency of 576 Hz. What is the fundamental frequency of the air column in this tube?
A) 32 Hz B) 64 Hz C) 88 Hz D) 128 Hz E) 256 Hz
Starting from very far away, an object is moved closer and closer to a converging lens, eventually reaching the lens. What happens to its image formed by that lens? (There could be more than one correct choice.)
A) The image gets farther and farther from the lens. B) The image eventually changes from real to virtual. C) The image eventually changes from virtual to real. D) The image gets closer and closer to the lens. E) The image keeps getting larger and larger.