A force of is exerted tangentially to a wheel of radius 0.340 m and causes an angular acceleration of 1.20 rad/s2. What is the moment of inertia of the wheel?
A) 4.78 kg ? m2
B) 3.59 kg ? m2
C) 5.98 kg ? m2
D) 7.17 kg ? m2
A
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According to Einstein's theory, the energy of a photon is
a. proportional to its wavelength. b. proportional to its frequency. c. constant, since the speed of light is a constant. d. quantized, since it always appears in bundles of size, 1.6 × 10^?19 C. e. proportional to the square of the frequency.
A student sees her physical science professor approaching on the sidewalk that runs by her dorm. She gets a water balloon and waits. When the professor is 2.0 s from being directly under her window 11 m above the sidewalk, she drops the balloon. You Finish the story.
A container is filled with water and the pressure at the container bottom is P. If the container is instead filled with oil having specific gravity 0.80, what new bottom pressure results?
a. a pressure < P b. the same pressure P c. a pressure > P d. This is unable to be determined with the information given.
Which of the following statements is true about the very early universe (within the first three minutes)?