Carly places one end of a steel bar in a Bunsen flame and the other end in an ice cube. By what factor is the rate of heat flow changed when the bar's cross-sectional area is doubled?
a. 2
b. 1/2
c. 4.0
d. 1/4
a
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At which is the potential smallest?
A. A B. B C. C D. D E. E F. None of the labeled points
Which of the following is a feature of Newtonian physics that is not correct according to quantum physics?
A) Tiny particles form the fundamental reality. B) Future events are predictable. C) Nature is "local," i.e., there are no instantaneous connections at a distance. D) All of the above.
A 29.0-pm-wavelength photon is scattered by a stationary electron
What is the maximum energy loss the photon can have? (melectron = 9.11 × 10-31 kg, c = 3.00 × 108 m/s, h = 6.626 × 10-34 J ? s, 1 eV = 1.60 × 10-19 J) A) 15 keV B) 4.0 keV C) 6.1 keV D) 10 keV E) 12 keV
Look at the four “circuits” shown in the figure below, and select those that will light the bulb