The ____________________ is that the universe is both isotropic and homogeneous
Fill in the blank(s) with correct word
cosmological principle
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When white light passes through a cool cloud of gas, we see
A) visible light. B) infrared light. C) thermal radiation. D) an absorption line spectrum. E) an emission line spectrum.
An electron traveling due North with speed 4 × 105 m/s enters a region where the earth's magnetic field has the magnitude 5 × 10-5 T and is directed downward at 45° below horizontal. What magnitude force acts on the electron?
What will be an ideal response?
If, in a parallel universe, ? has the value 3.14149, express ? in that universe to four significant figures
A) 3.141 B) 3.142 C) 3.1415 D) 3.1414
A high fountain of water is in the center of a circular pool of water. You walk the circumference of the pool and measure it to be 170 meters. You then stand at the edge of the pool and use a protractor to gauge the angle of elevation of the top of the fountain. It is 51°. How high is the fountain?
a. 17 m c. 30 m b. 23 m d. 33 m