The assumption that from any place in the universe the observer would measure the same physical properties we observe is called
A) Olbers's paradox.
B) general gelativity.
C) special relativity.
D) steady state physics.
E) the cosmological principle.
E
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Why is the claim of fossilized life in the Martian meteorite ALH84001 controversial?
A) it is doubtful that the rock actually came from Mars B) the proposed fossilized organisms in no way resemble any kind of life found on Earth C) the rock is too young to have fossilized life within it D) there are many possible nonbiological explanations for the observed evidence
A wire that is 1.0 mm in diameter and 3.5 m long stretches 3.5 mm when an 8.0-kg tool is hung from it
(a) What is Young's modulus for the material from this wire is made? (b) What is the effective spring constant for the stretching wire?
On bare feet, a tile floor feels colder than a rug because the tile has a greater ______________
Fill in the blank(s) with correct word
A jet plane has a sound level of 150 dB. What is the intensity in W/m2?
a. 1 b. 100 c. 10 d. 1 000 e. 10 000