Physics, 23.04.2020 19:06 kmoo176394
A set of twins, Andrea and Courtney, are initially 10 years old. While Courtney remains on Earth, Andrea rides on a spaceship which travels away from Earth at a speed of 0.60c for five years (as of measured by Courtney), then immediately turns around and comes back at 0.60c. When Andrea returns, Courtney is 20 years old. How old in Andrea upon her return?
a. 12 y
b. 18 y
c. 15y
d. 10y
e. 20y
Answers: 2
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In a classical model of the hydrogen atom, the electron moves around the proton in a circular orbit of radius 0.053 nm. what is the electron's orbital frequency? what is the effective current of the electron?
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A set of twins, Andrea and Courtney, are initially 10 years old. While Courtney remains on Earth, An...
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