At decoupling, the protons and electrons formed transparent hydrogen atoms, allowing the radiation to escape and become the present microwave background
Indicate whether the statement is true or false
TRUE
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Four of the five answers listed below are aspects of the scientific method. Select the exception
a. observation b. hypothesis c. experimentation d. philosophy e. conclusion
Spring tides occur
a. at new moon and first quarter moon. b. at first quarter and third quarter moons. c. at new moon and full moon. d. at third quarter and full moons. e. at noon and midnight.
Brewster's Angle: The critical angle for an air-glass interface is 42.6°. A light ray in air hits the interface, and the reflected ray is 100% polarized. What is the angle of refraction for that ray?
A. 47.4° B. 55.9° C. 24.3° D. 65.7° E. 34.1°
The acceleration of a ball as it rolls down a ramp is 4 m/s2 . The ball is referred to 2 s after it starts to roll. The velocity acquired after starting from rest is 8 m/s
Indicate whether the statement is true or false