In the cosmological principle, ________ implies that matter and energy are randomly distributed in space
A) isotropy
B) relativity
C) universality
D) geometry
E) homogeneity
E
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The visual appearance of Neptune is much bluer than Uranus
Indicate whether the statement is true or false
A 3.0-kg object moving 8.0 m/s in the positive x direction has a one-dimensional elastic collision with an object (mass = M) initially at rest. After the collision the object of unknown mass has a velocity of 6.0 m/s in the positive x direction. What is M?
A. 7.5 kg B. 5.0 kg C. 6.0 kg D. 4.2 kg E. 8.0 kg
The resulting atomic number of an element that emits 1 alpha particle, 1 positron, and 3 beta particles is
A) decreased by 2. B) decreased by 1. C) unchanged. D) increased by 1. E) increased by 2.
Which of the following statements about Titan is not true?
A) It is the coldest moon in the solar system. B) It may have an ocean of liquid ethane. C) Its surface is hidden from view by its thick atmosphere. D) Its temperature is too cold for liquid water to exist. E) Its atmosphere is mostly nitrogen.