A system of terrestrial-sized planets has been detected in orbit around a millisecond pulsar
Indicate whether the statement is true or false
TRUE
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In optical fibers of uniform density, light actually
A) curves in a direction parallel to the central axis of the fiber. B) travels in straight-line segments. C) travels along the outer surface of the fiber. D) none of the above
A certain automobile engine takes in 4.00 kJ of heat and performs 1.10 kJ of mechanical work in each cycle
(a) Calculate the engine's efficiency. (b) How much heat is "wasted" in each cycle? What will be an ideal response?
Should the tuner on a radio have small or large damping?
What will be an ideal response?
One of the radioactive isotopes that fell on the land and got into the food chain after the Chernobyl accident was 131I. Its half-life is 8 days
How long was it, following its deposit on the land, before its radioactivity had fallen to 1/32--about 3%--of its initial value? A) 16 days B) several years C) 48 days D) 40 days E) It is impossible to say, even approximately.