Venus, which is 95 percent the diameter of Earth, has a(n) _______________ atmosphere
Fill in the blank(s) with correct word
thick
cloudy
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Which of the following have the least RBE (relative biological effectiveness)?
A) slow neutrons B) beta particles C) alpha particles D) fast protons E) gamma rays
According to our theory of solar system formation, what three major changes occurred in the solar nebula as it shrank in size?
A) Its gas clumped up to form the terrestrial planets, nuclear fusion produced heavy elements to make the jovian planets, and central temperatures rose to more than a trillion Kelvin. B) It gained energy, it gained angular momentum, and it flattened into a disk. C) It got hotter, its rate of rotation increased, and it flattened into a disk. D) Its mass, temperature, and density all increased.
Equilibrium: A uniform ladder 12 meters long rests against a vertical frictionless wall, as shown in the figure. The ladder weighs 400 N and makes an angle ? = 51° with the floor. A man weighing 874 N climbs slowly up the ladder. When he is 78 m from the bottom of the ladder, it just starts to slip. What is the coefficient of static friction between the floor and the ladder?
Fill in the blank(s) with the appropriate word(s).
A stretched string can have ______________ natural frequency(ies)
a. one b. 10 times its length in c. 5 times its length in d. many