What is so unusual about Pluto's orbit?
A) Its orbital period is exactly twice that of Neptune's.
B) It lies exactly on the ecliptic.
C) It has an unexpectedly short orbital period.
D) It is more inclined to the ecliptic than any of the eight planets.
E) It has the lowest eccentricity of any planet's orbit.
D
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The largest plutons are called
a. sills. b. dikes. c. laccoliths. d. batholiths.
Synchrotron radiation is produced by
a. objects with temperature below 10,000 K. b. high-velocity electrons moving through a magnetic field. c. cold hydrogen atoms in space. d. the collapsing cores of massive stars. e. a helium flash.
Entropy: On a cold winter day, the outside temperature is -20°C and the inside temperature is maintained at 20°C. There is a net heat flow to the outside through the walls, roof, etc., of 25 kW. What is the rate of increase of the entropy of the universe as a result of this heat flow?
A. 13 W/K B. 25 W/K C. 85 W/K D. 99 W/K E. 0 W/K
The focal length of the objective lens of a telescope is 75.0 cm, and the eyepiece has a focal length of 6.00 cm. What is the magnification of this telescope?
A) 0.0800 B) 0.645 C) 450 D) 12.5 E) 200