Fusion is used to produce the largest nuclei known to exist
Indicate whether the statement is true or false
T
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Most of the modern large optical telescopes are refractors.
Answer the following statement true (T) or false (F)
The unified model describes active galactic nuclei using
a. a super massive black hole at the center of a normal spiral galaxy. b. a super massive black hole surrounded by an accretion disk and dense disk of gas. c. an accretion disk around a neutron star. d. gravitational lenses to intensify the radiation coming from them. e. different lines of sight toward and dwarf irregular galaxy.
An uncharged conductor has a hollow cavity inside of it. Within this cavity there is a charge of +10 µC that does not touch the conductor
There are no other charges in the vicinity. Which statement about this conductor is true? (There may be more than one correct choice.) A) The inner surface of the conductor carries a charge of -10 µC and its outer surface carries no excess charge. B) The inner and outer surfaces of the conductor each contain charges of -5 µC. C) The net electric field within the material of the conductor points away from the +10 µC charge. D) The outer surface of the conductor contains +10 µC of charge and the inner surface contains -10 µC. E) Both surfaces of the conductor carry no excess charge because the conductor is uncharged.
Which of the following is not true?
a. 2500 years ago people believed that earth is a sphere b. galileo discovered the phases of the moon c. edmund halley was the first to discover halley's comet d. le verrier predicted neptune without using a telescope e. Eris is larger than Pluto