Why can nothing (including light) escape a black hole?
A: Because of the gravitational redshift of light
B: The required escape velocity exceeds the speed of light
C: Because all material is tidally distorted and destroyed
D: Because of the extreme electromagnetic forces
E: Because the mass is greater than four solar masses
Ans: B: The required escape velocity exceeds the speed of light
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As a spaceship's velocity gets closer to the speed of light with respect to an external observer, that observer will report that
A) its length will increase and its clock will run more slowly. B) its length will decrease and its clock will run faster. C) its length will decrease and its clock will run more slowly. D) its length will increase and its clock will run faster. E) None of these will happen.
Magnetic confinement is used in controlled fusion experiments to control a plasma
a. True b. False Indicate whether the statement is true or false
The chemical alteration of preexisting rocks by chemically reactive, hot-water solutions is called ______________ metamorphism
Fill in the blank(s) with correct word
A particle in a 453 m-long linear particle accelerator is moving at How long does the particle accelerator appear to the particle?
A) 219 m B) 589 m C) 104 m D) 936 m