Answer Happy

1. The Planck radiation law * (1 Point) is a theoretical relationship between electromagnetic radiation and wavelength for a blackbody, which postulates that electromagnetic radiation can be emitted continuously. is a theoretical relationship between electromagnetic radiation and wavelength for a blackbody, which postulates that electromagnetic radiation is different than light. is a theoretical relationship between electromagnetic radiation and wavelength for a blackbody, which is identical to the Rayleigh-Jeans law. is a theoretical relationship between electromagnetic radiation and wavelength for a blackbody, which postulates that electromagnetic radiation comes in packets. 2. General relativity * (1 Point) is a theory of gravity which is equivalent to Newton's gravitational model, except that Newton predicted that black holes would not radiate. is a theory of gravity which is equivalent to Newton's gravitational model, except for the precession of the perihelion of Mercury. is a theory of gravity which states that gravity is not a force. is a theory of gravity which states that gravity is a force that objects feel as they enter regions of curved space.

3. Which of the following facts regarding the Solar System is not explained by the Nebular Hypothesis? * (1 Point) Rocky and metallic planets orbit relatively near the Sun. The Solar System rotates. All of the planets orbit in nearly circular orbits, in the same plane. The near side of the Moon contains a larger proportion of maria than does the far side. 4. Today, the universe is * (1 Point) accelerating due to dark matter. accelerating due to domination by radiation. expanding due to galactic rotation curves. accelerating due to dark energy.

5. Suppose that you are observing a G-type star that is moving toward you at a speed close to that of light. Which of the following statements is correct? * (1 Point) The star will look yellow-white. The star will look blue. The star will look red. The star will look green. 6. Which of the following statements about black holes is incorrect? A black hole is (select one) * (1 Point) an object that exerts tremendous gravitational pulls on all objects around it, even objects hundreds of light years from its event horizon. an object near which time ticks slowly. a region of space from which nothing--not even light--can escape. an extremely compact object that, according to our current understanding of physics, has been crushed under its own gravity to a single point. O O O