Compared to the ________ planets the ________ planets have ________.
A. terrestrial; Jovian; many satellites
B. Jovian; terrestrial; low density
C. terrestrial; Jovian; small diameter
D. Jovian; terrestrial; high escape velocity
Answer: A
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A proton (mass = 1.67 × 10^?27 kg, charge = 1.60 × 10^?19 C) moves from point A to point B under the influence of an electrostatic force only. At point A the proton moves with a speed of 60 km/s. At point B the speed of the proton is 80 km/s. Determine the potential difference VB ? VA
a. +15 V b. ?15 V c. ?33 V d. +33 V e. ?20 V
Based on current scientific evidence, the theory that has been most successful at explaining the origin of life on Earth is
A) naturism B) panspermia C) intelligent design D) chemical evolution
If a nonzero torque is applied to an object, that object will experience:
a. a constant angular speed. b. an angular acceleration. c. a constant moment of inertia. d. an increasing moment of inertia.
Captain Jirk reports to headquarters that he left the planet Senesca 1.88 × 10^4 seconds earlier. Headquarters sends back the message: "Was that spaceship proper time?" It will be spaceship proper time if it was
a. measured by one clock fixed at one spot on Senesca. b. measured by one clock fixed at one spot on the spaceship. c. measured by a clock on Senesca at departure and by a clock on the spaceship when reporting. d. measured by a clock on the spaceship when departing and by a clock on Senesca when reporting. e. calculated by dividing the distance from Senesca according to Senesca by the speed of the spaceship.