The vertical displacement of a string is given by y(x,t) = (6.00 mm) cos[(3.25 m-1)x – (7.22 s-1)t]. What is the wavelength of the wave?
A) 3.25 m
B) 1.93 m
C) 0.870 m
D) 0.308 m
E) 0.139 m
B
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You are walking around on a solid surface; the surface gravity is comfortable, but it is "hot as hell." It feels as if your eyeballs are being squeezed, and your insides are queasy (due to the high pressure—almost like being deep in the ocean)
Your life-support belt is corroding. The Sun, barely visible through the haze, is near your meridian; you hope for nightfall (unaware that it would provide no substantial relief), but you already have been stuck on this planet for 72 hours, and the Sun seems not to have moved through the sky (and, if it moved at all, it moved eastward from the meridian).
The Sun's habitable zone
A) extends from some place a little beyond the orbit of Venus to some place near the orbit of Mars. B) consists only of Earth, since Earth is the only planet known to be inhabited. C) extends from the orbit of Earth to the orbit of Jupiter. D) extends from just beyond the orbit of Mercury to just beyond Earth's orbit.
Bottles of perfume sometimes have thick glass (n = 1.5) walls which give the impression the volume is larger than it is. Assume a cylindrical bottle has an inner radius of 1.0 cm and an outer radius of 2.0 cm. How thick (in cm) would the wall appear if you could see a mark on the inside surface?
a. 0.80 b. 0.51 c. 0.72 d. 80 e. 12
Radio waves, of sufficient frequency, pass through which of the following ion layers?
a. C b. D c. E d. F