A 0.12-m-radius grinding wheel takes 6.0 s to speed up from 2.0 rad/s to 11.0 rad/s. What is the wheel's average angular acceleration?
a. 5.6 rad/s2
b. 0.22 rad/s2
c. 1.5 rad/s2
d. 0.080 rad/s2
c
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The "R-value" of material is not related to its ________
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Hydrogen emits light at certain discrete frequencies. One particular emission has a frequency of 4.57 × 1015 s-1, as measured in the frame of reference of the hydrogen atom
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