The materials that compose most of Titan are completely different than those that compose Earth. Therefore, what were scientist surprised to see from space-probe images in a 2005 landing?
A) some indications that an ancient civilization may have inhabited Titan approximately 500,000 years ago
B) a landscape similar to Earth's
C) an utterly alien landscape, unlike anything seen on Earth
D) the image of a man's face on an equatorial mountain range
Answer: B
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The spacing between the parallel power lines is affected by
A) current-carrying capacities of wires. B) electrical insulation. C) the wing span of birds in the vicinity. D) none of the above
A +3.0-µC point charge is initially extremely far from a positive point charge Q
You find that it takes 41 J of work to bring the +3.0-µC charge to the point x = 3.0 mm, y = 0.0 mm and the point charge Q to the point x = -3.0 mm, y = 0.00 mm. What is Q? (k = …) A) 27 pC B) 9.1 µC C) 4.6 µC D) 55 nC
What must the initial state of motion of a charged particle be if it will follow a helical path in a magnetic field?
a) It must be moving at an angle that is neither parallel to nor perpendicular to the magnetic field. b) It must be moving parallel to the magnetic field. c) It must be moving perpendicular to the magnetic field. d) It must be moving in the direction opposite to the magnetic field. e) It must be initially at rest when it is placed in the magnetic field.
In the lab, a relativistic proton has a momentum of 1.00 × 10-19 kg ? m/s and a rest energy of 0.150 nJ. What is the speed of the proton in the lab? (c = 3.00 × 108 m/s, mproton = 1.67 × 10-27 kg)
A) 0.170c B) 0.196c C) 0.911c D) 0.930c E) 0.951c