The farthest galaxies that astronomers have seen are all elliptical galaxies
a. True
b. False
Indicate whether the statement is true or false
False
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In what ways is Earth different from the other terrestrial planets?
A) Its lithosphere is broken into plates that move around. B) It has a much higher percentage of oxygen in its atmosphere. C) Most of its surface is covered with liquid water. D) Life can be found almost everywhere on its surface. E) All of the above are true.
Recyclables are more inconvenient for the consumer to deal with than throwaways
What will be an ideal response?
Which of the following best describes what would happen if a 1.5-solar-mass neutron star, with a diameter of a few kilometers, were suddenly (for unexplained reasons) to appear in your hometown?
A) The entire mass of Earth would end up as a thin layer, about 1 cm thick, over the surface of the neutron star. B) It would rapidly sink to the center of Earth. C) The combined mass of Earth and the neutron star would cause the neutron star to collapse into a black hole. D) It would crash through Earth, creating a large crater, and exit Earth on the other side. E) It would crash into Earth, throwing vast amounts of dust into the atmosphere which in turn would cool Earth. Such a scenario is probably what caused the extinction of the dinosaurs.
A convex lens has focal length f. If an object is placed at a distance of 2f from the lens on the principal axis, the image is located at a distance from the lens
A) of 2f. B) between f and 2f. C) of f. D) between the lens and f. E) of infinity.