The helium fusion process works by fusing two helium nuclei into one beryllium nucleus
Indicate whether the statement is true or false
FALSE
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A 30-year-old woman takes a trip on a rocket, leaving her 20-year-old brother behind. She travels at a speed of 0.8 c, and is gone 20 years, according to the younger brother. When she returns, how many years older/younger is she than her brother?
a. 2 years younger b. 2 years older c. 3 years older d. 10 years older e. 8 years older
Wave Characteristics: Which one of the following lists gives the correct order of the electromagnetic spectrum from low to high frequencies?
A. radio waves, infrared, microwaves, ultraviolet, visible, x-rays, gamma rays B. radio waves, ultraviolet, x-rays, microwaves, infrared, visible, gamma rays C. radio waves, microwaves, infrared, visible, ultraviolet, x-rays, gamma rays D. radio waves, microwaves, visible, x-rays, infrared, ultraviolet, gamma rays E. radio waves, infrared, x-rays, microwaves, ultraviolet, visible, gamma rays
Dark nebula appear dark because they
A) reflect light. B) emit light. C) are opaque. D) are transparent.
Why couldn't electrons bind to nuclei when the nuclei first formed?
A) electrons exert the strong force on the nuclei and repel it B) universe was much too hot C) universe was much too cold D) electrons exert the weak force on the nuclei and repel it E) electrons have negative charge and repel the nuclei