The kinetic energy of a pendulum is ______________ at the bottom of its swing
Fill in the blank(s) with correct word
maximum (or greatest)
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Refraction results from differences in light's
A) frequency. B) incident angles. C) speed. D) all of the above E) none of the above
An electric motor and electric generator differ in
A) the roles of input and output. B) basic construction. C) size. D) quality.
A charge of 20 nC is distributed uniformly along the x axis from x = ?2.0 m to x = +2.0 m. What is the electric potential (relative to zero at infinity) at the point x = 5.0 m on the x axis?
A. 57 V B. 48 V C. 38 V D. 67 V E. 100 V
How do astronomers define the "superforce"?
A) a force connecting electromagnetism with the strong and the weak nuclear forces B) the GUT, with all five forces combined C) the GUT, but with no dark energy added in D) a force connecting gravity and the electroweak force E) a force including only dark energy and gravity