The planets __________ and ___________ are never visible near the eastern horizon at sunset
Fill in the blank(s) with correct word
Mercury, Venus
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A Carnot engine
A. consists of zero heat flow and constant pressure processes. B. consists of only processes which do not involve heat flow. C. consists of only isothermal processes. D. absorbs heat at a single high temperature and rejects heat at a single low temperature. E. consists of constant temperature and constant volume processes.
Two long straight parallel wires separated by a distance of 20 cm carry currents of 30 A and 40 A in opposite directions. What is the magnitude of the resulting magnetic field at a point that is 15 cm from the wire carrying the 30-A current and 25 cm from the other wire?
a. 51 mT b. 33 mT c. 72 mT d. 64 mT e. 46 mT
Some texts use the kilogram-mole rather than the gram-mole. What would be the values of the gas constant R and Avogadro's number NA using the kg-mole?
What will be an ideal response?
Ten seconds after starting from rest, a freely-falling baseball will have a speed of about
A) 10 m/s. B) 50 m/s. C) 100 m/s. D) 500 m/s. E) more than 500 m/s.