Explain why relativity allows us to travel, in principle, to the center of the Milky Way, but we would never be able to tell our friends back home about it
What will be an ideal response?
If we could build a very fast spacecraft that traveled within a tenth of a percent of the speed of light, then time dilation and length contraction allow us to travel the 28,000 light-years to the center of the Milky Way in what would seem like just a few years to us. However, back home on Earth, the trip would take about 28,000 years to go and another 28,000 years to come back: none of your friends would be around to listen to your tales of adventure when you returned. Note that even if you sent a radio message while you were at the center of the Galaxy, it would still take 28,000 years to arrive at Earth because the radio waves barely move faster than the spacecraft.
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What were the first celestial bodies added to our solar system inventory by Galileo and his telescope? Why were they important?
What will be an ideal response?
"30/40 vision" is a measure of
A) eyeball size. B) chromatic aberration. C) visual acuity. D) astigmatism. E) the resolution of the eye.
The y-component of the electric field of an electromagnetic wave traveling in the +x direction through vacuum obeys the equation Ey = (375 N/C) cos[kx - (2.20 × 1014 rad/s)t]. (c = 3.0 x 108 m/s)
(a) What is the largest that the x-component of the wave can be? (b) What is the largest that the z-component of the wave can be?
A(n) ______________ fault occurs as the result of expansive forces
Fill in the blank(s) with correct word