An astronaut measures her mass by means of a device consisting of a chair attached to a large spring. The period of oscillation she undergoes when set into motion is used to determine her mass. If the spring constant is 1250 N/m and 27 seconds is required for her to undergo 10 full oscillations what is the mass of the astronaut and chair?
A. 231 kg
B. 537 kg
C. 85.5 kg
D. 171 kg
A. 231 kg
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_______________ is the most reflective object in the Solar System
Fill in the blank(s) with correct word
From the Sun, the distance to the Galactic Center is about:
A) 8 pc. B) 8,000 pc. C) 100,000 pc. D) 225 million pc. E) 100 billion pc.
Atoms are held together by
A) the electrostatic force of attraction between the protons in the nucleus and the surrounding electrons B) the combined electrostatic force of attraction between the protons and neutrons in the nucleus and the surrounding electrons C) the force of gravitational attraction between the protons in the nucleus and the surrounding electrons D) the electrostatic force of attraction between the neutrons in the nucleus and the surrounding electrons
Consider a star with 2 planets. The mass of planet A is the same as the mass of planet B. The orbit of Planet A is on average, closer to the star than the orbit of Planet B. Which of the following statements is true?
A) Planet A moves with the same speed as Planet B. B) Planet A is, on average, moving slower than Planet B. C) The relative orbital speeds depend on the masses of the planets. D) Planet A is, on average, moving faster than Planet B.