According to measurements made here on Earth, the distance to Alpha Centauri is about 4 light-years. If a spaceship is traveling toward Alpha Centauri at 0.999c, How far away is Alpha Centauri according to the travelers in the ship?
A) also about 4 light-years
B) very slightly more than 4 light-years
C) very slightly less than 4 light-years
D) quite a bit less than 4 light-years
E) quite a bit more than 4 light-years
D) quite a bit less than 4 light-years
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When Voyager 2 was routed to fly by Saturn, it was originally the plan to have the satellite fly through the Cassini gap. Why would this have been a bad idea?
A) That route would have taken Voyager 2 within the Roche Limit and the satellite would have been torn to pieces. B) That route would have taken Voyager 2 inside Saturn's magnetic field causing the electronics on board to be destroyed. C) The Cassini gap actually contains a large moon that orbits Saturn with a very high speed and Voyager 2 would have collided with that moon. D) The gaps in Saturn's ring system (including the Cassini gap) are not actually empty space, rather they are an area of low density in the rings. E) Voyager 2 would have encountered density waves which would have crushed the satellite.
When a beam of white light is refracted through a prism, which of the following colors has the greatest angular deviation from the original direction of the beam?
1.red 2.yellow 3.blue 4.violet
Where the optic nerve penetrates the eye
A. Astigmatism |
B. Eye Dominance |
C. Focus |
D. Blind Spot |
E. Color Blindness |
F. Afterimages |
An old bone sample contains 321. grams of carbon and its activity is 947. decays/min. (5730. yr half life of Carbon-14) (a) How many thousand years old is the sample? (b) What will be the activity of the sample 2000. yrs from now?
What will be an ideal response?