A conclusion from special relativity is that events that are simultaneous in one inertial frame
A. are simultaneous in all inertial reference frames.
B. are simultaneous in all inertial frames moving at the same speed.
C. may not be simultaneous in another inertial reference frame.
D. are simultaneous in inertial reference frames moving in the same direction.
E. are simultaneous in inertial reference frames moving in the opposite direction.
C. may not be simultaneous in another inertial reference frame.
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The diagram below shows the position of a long straight wire perpendicular to the page and a set of directions labeled A through H. When the current in the wire is directed up out of the page, the direction of the magnetic field at point P is
A. E. B. F. C. G. D. H. E. A.
Michael is going to the store 6 miles away. He rides his bike at 12 mph for the first half of the trip, then walks at 4 mph for the remainder
Michael's average speed for the trip to the store is closest to:
1.2 mph 2.4 mph 3.6 mph 4.8 mph 5.10 mph 6.12 mph 7.14 mph 8.exactly halfway between two of the values above 9.impossible to determineTwo masses, MA and MB, with MB = 2MA, are released at the same time and allowed to fall straight down. Neglect air resistance. When we compare their kinetic energies after they have fallen for equal times, we find that
a. KB = KA. b. KB = 2KA. c. KB = 4KA. d. KA = 2KB. e. KA = 4KB.
Suppose we imagine the Sun to be about the size of a grapefruit (about 10 cm across). How far away are the nearest stars (the three stars of Alpha Centauri)?
A) 2.5 miles B) 2,500 miles C) 250 miles D) the length of a football field E) 25,000 miles