If something falls into a black hole, it remains intact until it reaches the event horizon
Indicate whether the statement is true or false
FALSE
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The main sequence has a limit at the lower end because
a. low mass stars form from the interstellar medium very rarely. b. low mass objects are composed primarily of solids, not gases. c. pressure does not depend on temperature in degenerate matter. d. the lower limit represents when the radius of the star would be zero. e. there is a minimum temperature for hydrogen nuclear fusion (the definition of a star).
A 0.30-kg block of wood is suspended on a spring. In equilibrium the wood stretches the spring 2.0 cm downward. The wood is then pulled an additional distance of 1.0 cm down and released from rest
(a) How long does it take the wood to make 3 complete cycles of vibration? (b) How much total mechanical energy does this system contain if we choose the total potential energy (elastic and gravitational) to be zero at the equilibrium position of the hanging block?
________ galaxies seem to represent a transition between quasars and similar active nuclei compared to more normal spirals
Fill in the blank(s) with correct word
If the acceleration vector of an object is directed anti-parallel to the velocity vector,
A) the object is turning. B) the object is speeding up. C) the object is slowing down. D) the object is not moving. E) this situation would not be physically possible.