A ball is dropped from somewhere above a window that is 2.00 m in height. As it falls, it is visible to a person looking through the window for 200 ms as it passes by the 2.00 m height of the window
From what height above the top of the window was the ball dropped? A)
8.32 m
B)
1.87 m
C)
4.15 m
D)
4.76 m
E)
6.78 m
C
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In the Sun, nuclear fusion occurs
A. throughout the entire star. B. only in the core. C. in concentric shells D. in the core and the radiative zone.
Center of Mass: A 1.0-g bead is at (-2.0 cm, 2.0 cm), a 2.0-g bead is at (2.0 cm, -4.0 cm), and a 3.0-g bead is at (2.0 cm, 0.0 cm). What are the coordinates of the center of mass (or center of gravity) of this system of beads?
Fill in the blank(s) with the appropriate word(s).
Is it possible for the total mechanical energy of a moving particle to be negative?
a. No, because a moving particle has positive kinetic energy. b. No, because potential energy cannot have a value more negative than the value of the positive kinetic energy of the particle. c. Only if friction is involved. d. yes
If a volume of air is warmed, it expands. If a volume of air expands, it
A) warms. B) cools. C) neither warms nor cools.