About what percent of all asteroids are C-type asteroids?
A) 5%
B) 10%
C) 15%
D) 50%
E) 75%
B
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Which of the Jovian planets has rings?
A. Saturn B. Uranus C. Neptune D. Jupiter E. All of these choices are correct.
A certain siren radiates sound uniformly in all directions. At a distance of 17 m from the siren, the intensity level is 49 db. How many watts of power does this siren put out? The threshold of human hearing is 1.0 × 10-12 W/m2
What will be an ideal response?
A racecar goes around a 200 m radius curve at a constant speed of 40 m/s. Its acceleration is
a. 0. b. 0.2 m/s2. c. 4 m/s2. d. 8 m/s2. e. 16 m/s2.
A 6.0-kg object, initially at rest in free space, "explodes" into three segments of equal mass. Two of these segments are observed to be moving with equal speeds of 20 m/s with an angle of 60° between their directions of motion. How much kinetic energy is released in this explosion?
a. 2.4 kJ b. 2.9 kJ c. 2.0 kJ d. 3.4 kJ e. 1.2 kJ