The parallax of the stars is very big and can be easily seen with the unaided eye
Indicate whether the statement is true or false
False
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For main-sequence stars, which of the following is true about low-mass stars compared to high-mass stars?
A) Low-mass stars are cooler and less luminous than high-mass stars. B) Low-mass stars are hotter and more luminous than high-mass stars. C) Low-mass stars are cooler but more luminous than high-mass stars. D) Low-mass stars are hotter but less luminous than high-mass stars. E) Low-mass stars have the same temperature and luminosity as high-mass stars.
If the lens in a person's eye is too highly curved, this person is suffering from
A) farsightedness. B) spherical aberration. C) astigmatism. D) chromatic aberration. E) nearsightedness.
The Japanese name for the asterism we call the Pleiades
A 2000. kg car, traveling to the right at 30. m/s, collides with a brick wall and comes to rest in 0.20 s. The average force the car exerts on the wall is
A) 60. kN. B) 300 kN. C) 600 kN. D) 12. kN. E) 30. kN.