Hurricanes are powered by
a. Hadley circulation.
b. the Coriolis effect.
c. the heat of vaporization of water.
d. electrical conductivity of water.
e. the greenhouse effect.
c. the heat of vaporization of water.
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Atomic Nucleus: The atomic number and mass number for calcium-39 are 20 and 39, respectively. How many neutrons are in one atom?
A. 1 B. 19 C. 20 D. 39 E. 59
Two satellites with equal rest masses of 100 kg are traveling toward each other in deep space. They have identical speeds of 0.600c
The satellites collide and somehow manage to stick together. What is the rest mass of the combined object after the collision? A) 200 kg B) 225 kg C) 250 kg D) 275 kg E) 300 kg
A binary star system in the constellation Orion has an angular separation between the two stars of 1.2 × 10^?5 radians. If ? = 5 × 10^?7 m, what is the smallest-aperture (diameter) telescope that may be used to resolve the two stars?
a. 10 cm b. 5 cm c. 50 cm d. 1 m e. 4 cm
A laser shines 630-nm light through a grating producing a first order (m = 1) maximum at an angle of 30°. A second laser produces a first order maximum with the same grating at 20°. What is the wavelength emitted by the second laser?
a. 945 nm c. 420 nm b. 651 nm d. 431 nm