What word or phrase would be a reasonable description of dark energy?
A: strong force binding.
B: electromagnetic repulsion.
C: weak force binding.
D: attractive force.
E: negative gravity
Ans: E: negative gravity
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What will be an ideal response?
If a man wishes to use a plane mirror on a wall to view both his head and his feet as he stands in front of the mirror, the required length of the mirror:
a. is equal to the height of the man. b. is equal to one half the height of the man. c. depends on the distance the man stands from the mirror. d. depends on both the height of the man and the distance from the man to the mirror.
Energy flows from hot to cold and thus from the core to the surface of the Sun
a. True b. False Indicate whether the statement is true or false
The heaviest nuclei of all are formed
A) in the horizontal branch. B) in dense white dwarfs. C) during nova explosions. D) in the ejection of matter in the planetary nebula. E) in the core collapse that set the stage of Type II supernovae.