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
b
Physics & Space Science
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A. 1 B. 2 C. 3 D. 4 E. 5
Physics & Space Science
The lattice parameter of CsCl is 0.4123 nm. Calculate the density of CsCl.
What will be an ideal response?
Physics & Space Science
Contrast the internal structure of a planet like Jupiter with that of a typical terrestrial planet in as many ways as possible
What will be an ideal response?
Physics & Space Science
At extremely high densities and temperatures, electrons can be forced to fuse with protons. This reaction produces
a. hydrogen. b. helium and energy. c. degenerate electrons. d. neutrons and neutrinos. e. large amounts of radio radiation.
Physics & Space Science