Jason takes off across level water on his jet-powered skis. The combined mass of Jason and skis is 75 kg (the mass of the fuel is negligible). The skis have a thrust of 200 N and a coefficient of kinetic friction on water of 0.1
Unfortunately, the skis run out of fuel after only 90 s. What is Jason's top speed? A) 150 m/s
B) 240 m/s
C) 24 m/s
D) 90 m/s
A
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Which of the following best describes the Tropic of Cancer?
A) It is the circle of latitude on Earth for which the Sun appears to remain above the horizon for a full 24 hours on the summer solstice. B) It is the circle of latitude on Earth for which the Sun appears directly overhead at noon on the spring and fall equinoxes. C) It is the line of right ascension passing through the constellation of Cancer. D) It is the circle of latitude on Earth for which the Sun appears directly overhead at noon on the summer solstice.
What is the peak voltage in an ac circuit where the rms voltage is 120 V?
A) 84.8 V B) 120 V C) 170 V D) 240 V
What is an artificial star?
A) a meteor B) the unseen member of a binary star system C) a satellite orbiting Earth D) a point of light in Earth's atmosphere created by a laser for the purpose of monitoring atmospheric fluctuations E) a possible source of dark matter in the universe
In the two-slit experiment, monochromatic light of frequency 5.00 × 1014 Hz passes through a pair of slits separated by 2.20 × 10-5 m. (c = 3.00 × 108 m/s)
(a) At what angle away from the central bright spot does the third bright fringe past the central bright spot occur? (b) At what angle does the second dark fringe occur?