Suppose you're an astronaut being paid according to the time you spend traveling in space. You take a long voyage traveling at a speed near that of light. Upon your return to Earth, you're asked how you'd like to be paid: according to the time elapsed on a clock on Earth or according to your ship's clock. To maximize your paycheck, which should you choose?

1.the Earth clock
2.the ship's clock
3.either clock because it doesn't make a difference


1

Physics & Space Science

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An observer in the Northern Hemisphere takes a time exposure photograph of the night sky. If the illustration below depicts the photograph taken by the observer, which direction was the camera pointing?



a.
straight north
b.
straight east
c.
straight south
d.
straight west
e.
straight up, directly overhead

Physics & Space Science

The point in Earth's orbit where Earth is farthest from the Sun is known as perihelion. precession. the winter solstice. aphelion. a and d.

a. aphelion.
b. perihelion.
c. precession.
d. the winter solstice
e. a and d

Physics & Space Science

If the scalar (dot) product of two vectors is negative, it means that

A. there was a calculator error. B. the angle between the vectors is less than 90 degrees. C. the angle between the vectors is 90 degrees. D. the angle between the vectors is greater than 270 degrees. E. the angle between the vectors is between 90 and 180 degrees.

Physics & Space Science

The net force acting on a 12.6-kg object is given by Fx = (8 – x) N, where Fx is in newtons and x is in meters. How much work is done on the object as it moves from x = 0 to x = 6 m?

a. 64 J b. 30 J c. 28 J d. 24 J

Physics & Space Science