Which statement about Jupiter's rings is FALSE?
A) They are made of dark dusty particles.
B) They lie in the planet's equatorial plane.
C) They lie closer to Jupiter than Io's orbit.
D) They are made of ice, like Saturn's.
E) They may be made in part of material from Metis and Adrastea.
D
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The ratio of an animal's brain weight to body weight is thought to be roughly proportional to its
A) sex drive B) height C) rate of movement D) intelligence
The concept that the direction of observation does NOT matter overall is
A) universality. B) homogeneity. C) geometry. D) isotropy. E) relativity.
The mass of Pluto is 1.31 × 1022 kg and its radius is 1.15 × 106 m. What is the acceleration of a freely-falling object at the surface of Pluto if it has no atmosphere? (G = 6.67 × 10-11 N ? m2/kg2 )
A) 9.81 m/s2 B) 1.62 m/s2 C) 3.72 m/s2 D) 0.661 m/s2 E) 0.140 m/s2
Two long parallel wires each carry a current of 5.0 A directed to the east. The two wires are separated by 8.0 cm. What is the magnitude of the magnetic field at a point that is 5.0 cm from each of the wires?
a. 72 ?T b. 48 ?T c. 24 ?T d. 96 ?T e. 32 ?T