General Questions: A girl attaches a rock to a string, which she then swings counter-clockwise in a horizontal circle. The string breaks at point P in the figure, which shows a bird's-eye view (as seen from above). Which path (A-E) will the rock follow?
A. Path A
B. Path B
C. Path C
D. Path D
E. Path E
Answer: B
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Water is being sprayed from a nozzle at the end of a garden hose of diameter 2.25 cm. If the nozzle has an opening of diameter 1.30 cm, and if the water leaves the nozzle at a speed of 14.0 m/s, what is the speed of the water inside the hose?
a. 4.67 m/s b. 41.9 m/s c. 2.38 m/s d. 5.67 m/s e. also 14.0 m/s
The deuterium in distant quasars and in the interstellar medium suggests that the universe is open
Indicate whether the statement is true or false
If atmospheric refraction did not occur, how would the apparent time of sunrise and sunset be changed?
a. Both would be later. b. Both would be earlier. c. Sunrise would be later and sunset earlier. d. Sunrise would be earlier and sunset later.
A board that is 20.0 cm wide, 5.00 cm thick, and 3.00 m long has a density 300 kg/m3. The board is floating partially submerged in water. What fraction of the volume of the board is above the surface of the water?
A) 0.300 B) It depends on which edge of the board is vertical. C) 0.700 D) zero E) 0.200