It is very cold, but otherwise quite comfortable. You breathe deeply
Although there is no oxygen (not to worry—your life-support belt will take care of that problem), the air pressure is quite tolerable and seems almost Earth-like (because it is mostly nitrogen). Your vista might even include such breathtaking sights as an ocean of liquid methane before you, and snow-capped (methane snow) mountains behind (although the atmosphere is very smoggy and the visibility consequently is limited). Your solar day is about 16 Earth days long. A large, ringed object seems to hang in your sky, never rising or setting; however, it goes through phases from new to full and back to new again with the same 16-day period as the rising and setting of the Sun.
You are on Titan, a moon of Saturn. Saturn remains stationary in your sky because Titan rotates synchronously with its revolution about Saturn. (You might want to read The Sirens of Titan by Kurt Vonnegut. Be sure to keep in mind, however, that his description of Titan is 30 years out of date.) Titan was visited by a probe from the Cassini spacecraft to Saturn in 2005.
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Coulomb's Law: The figure shows two tiny 5.0-g spheres suspended from very light 1.0-m-long threads. The spheres repel each other after each one is given the same positive charge and hang at rest when ? = 4.1°. What is the charge on each sphere? (k = 1/4??0 = 9.0 × 109 N ? m2/C2)
A. 22 nC B. 89 nC C. 360 nC D. 180 nC E. 45 nC
The natural radioactivity in a typical human body is closest to
A. 0.2 per hour B. 12 per hour C. 12 per minute D. 4000 per second
How do humans use their eyes to measure relative distance by parallax?
a. By continuously focusing our eyes on distant objects we can determine distance. b. Since our eyes are separated the brain interprets the relative look angles of these eyes in terms of distance to the object viewed. c. Our eyes can measure the time it takes light to travel from an object and from this we get distance. d. By moving our heads from side to side our brain compares look angles from each of these positions to obtain the distance to the object viewed.
As it orbits the Earth, the Moon appears to move eastward about its own diameter every hour
Indicate whether the statement is true or false