Ch. 15 Study Questions Vmartinez

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Ch. 15 Study Questions 1. State the first postulate of Special Relativity. The first postulate of special relativity states that regardless of which speed you move your physical reality remains the same. 2. How must an object be moving to be describable by Special Relativity? In order for an object to be describable by Special Relativity it must be moving in a straight line and at a constant speed. 3. In General Relativity, gravity is not a force. So, Einstein, what is it? It is a distortion, a warp of space time. 4. What happens to the passage of time on a clock as the clock moves faster and faster? When a clock moves faster and faster the slower time moves. 5. What happens to the energy of a photon flying outward through a star’s gravitational field? The energy of a photon flying outward through a star’s gravitational field will be lower. 6. What is the maximum possible mass of a neutron star? The maximum possible mass of a neutron star is 2.1 solar masses. 7. What is the “event horizon” of a black hole? The event horizon is the spherical boundary between a black hole and the outside universe. 8. What is a Schwarzschild black hole? It is a basic black hole, they do not have electric charge and do not spin. 9. What is a Kerr black hole? A Kerr black hole is a rotating black hole that is empty except for the ring shaped singularity. 10. What do you call the connection from a rotating black hole to another part of spacetime? The connection from a rotating black hole to another part of spacetime is called a wormhole. 11. What are the four mass ranges for black holes? The four mass ranges for black holes are supermassive, intermediate-mass, stellar-mass, and primordial.
12. What are gravitational waves? Gravitational waves are ripples that are sent out by the motion of matter or energy and travel at the speed of light.
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