What is the origin of the jovian moons?
A) They all formed with the planet.
B) They were main belt asteroids, captured by Jupiter's strong gravity.
C) They are Trojan asteroids, orbiting 60 degrees ahead or behind Jupiter.
D) The four Galilean moons formed with Jupiter, most others were later captures.
E) They were ripped from the planet's interior in an early cataclysmic event.
D
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The tension in the string is closest to:
A light flash leaves a master clock at x = 0 at time t = -12 s, is reflected from an object a certain distance in the -x direction from the origin, and then returns to the origin at t = +8 s. From this information, we can infer that the spacetime coordinates of the reflection event are [t, x] =
A. [4 s, 20 s] B. [-4 s, -20 s] C. [10 s, -2 s] D. [2 s, -10 s] E. [-2 s, -10 s] F. Other (specify)
Which of the following speeds is greatest? (2.54 cm = 1.00 in.)
A) 10 km/h B) 10 m/s C) 10 ft/s D) 10 mi/h E) 10 yd/s
Three masses, 1.0 kg, 2.0 kg, and 3.0 kg, are located at (0.0 m, 0.0 m), (1.0 m, 1.0 m), and (2.0 m, -2.0 m), respectively. What is the location of the center of mass (or center of gravity) of this system?
A) (1.3 m, 0.67 m) B) (1.3 m, -0.67 m) C) (-1.3 m, 0.67 m) D) (-1.3 m, -0.67 m)