Molecules in a region of expanding air more often collide with neighboring molecules that are
A) approaching.
B) receding.
C) nearly out of range.
Answer: B
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According to the consensus among those scientists who have studied the question, what is the scientific status of the notion that Earth is now or was in the past visited by extraterrestrial life?
A) Although extraterrestrial life is theoretically plausible, and there is observational evidence for it, most scientists still will not accept the conclusion that we have been visited because it seems too unconventional or "kooky." B) Extraterrestrial life is theoretically plausible, and there is real observational evidence for it, which is why most scientists believe that we have been visited. C) Although there is no real evidence that Earth has been visited by extraterrestrials, extraterrestrial life is theoretically plausible. D) Extraterrestrial life is implausible on general theoretical grounds, and there is no real evidence that Earth has been visited by extraterrestrials. E) Although extraterrestrial life is implausible on general theoretical grounds, there is observational evidence for it.
An ideal solenoid with 3000 turns is 70.0 cm long. If its self-inductance is 25.0 mH, what is its radius? (?0 = 4? × 10-7 T ? m/A)
A) 0.0222 m B) 52.0 m C) 0.00199 m D) 327 m
A 0.28-kg block on a horizontal frictionless surface is attached to an ideal massless spring whose spring constant is 500 N/m. The block is pulled from its equilibrium position at x = 0.00 m to a displacement x = +0.080 m and is released from rest
The block then executes simple harmonic motion along the horizontal x-axis. When the displacement is x = -0.052 m, find the acceleration of the block. A) 92 m/s2 B) 46 m/s2 C) 69 m/s2 D) 230 m/s2 E) 280 m/s2
Explain what is meant by saying a thermometer measures its own temperature
What will be an ideal response?