What centripetal force does an 80.0-kg passenger experience when seated 10.0 m from the center of a Ferris wheel whose angular speed is 0.500 rad/s?
a. 2.00 N
b. 24.5 N
c. 400 N
d. 200 N
d
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Why can't we see the center of our galaxy with our eyes?
A) We are in the center of the Milky Way. B) There are no stars in the center of the Milky Way, just a supermassive black hole. C) Interstellar dust and gas absorbs and scatters visible light before it can reach us from the center. D) The center of the Milky Way does not emit enough visible light. E) Stars are too densely spaced in the plane of our galaxy to see all the way to the center.
In semi-crystalline polymers, there is a spike in the specific heat when the crystallites start to _____________.
Fill in the blank(s) with the appropriate word(s).
When a mass of 180 g is attached to a vertical spring and lowered to its equilibrium position, it is found that the spring extends 12 cm
If the mass is now displaced from its equilibrium position, what is the period of the resulting oscillations? A) 2.2 s B) 3.7 s C) 0.69 s D) 9.0 s E) 1.5 s
The increase in tensile and shear yield strength due to the strain hardening of metals is proportional to the dislocation density to the _________ power.
Fill in the blank(s) with the appropriate word(s).