A 51.8-kg bungee jumper jumps off a bridge and undergoes simple harmonic motion. If the period of oscillation is 11.2 s, what is the spring constant (force constant) of the bungee cord?
A) 16.3 N/m
B) 19.6 N/m
C) 26.1 N/m
A
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The Voyager 2 Spacecraft is currently on its way out of our solar system at a speed of about 50,000 kilometers per hour. It will reach the distance of the nearest star system (beyond our solar system) in about ________ years.
A) 100 B) 1000 C) 10,000 D) 100,000 E) 1,000,000
Size of the Nucleus: If an atomic nucleus containing 64 nucleons has a radius R, what will be the expected radius of a nucleus containing 512 nucleons?
A. R B. 2R C. 4R D. 8R E. 16R
Why does the burning of fossil fuels increase the greenhouse effect on Earth?
A) The heat from the flames warms the planet. B) Burning fossil fuels releases carbon dioxide into the atmosphere. C) Burning fossil fuels depletes the amount of ozone, thereby warming the planet. D) Burning fossil fuels produces infrared light, which is then trapped by existing greenhouse gases.
Spectral lines from Galaxy B are redshifted from their rest wavelengths twice as much as the spectral lines from Galaxy B. According to Hubble's law, what can you say about their approximate relative distances?
A) Galaxy A is twice as far as Galaxy B. B) Galaxy B is four times as far as Galaxy A. C) Galaxy B is twice as far as Galaxy A. D) Galaxy A is four times as far as Galaxy B. E) Not enough information to say; you need to know Hubble's constant to answer this question.