A heat engine absorbs 64 kcal of heat each cycle and exhausts 42 kcal
(a) Calculate the efficiency each cycle.
(b) Calculate the work done each cycle.
(a) 34%
(b) 22 kcal
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A highly ionized atom with Z = 5 has only one electron left around it, in its ground state. How much more energy is required to finish the job and have a bare nucleus?
A) 13.1 eV B) 10.9 eV C) 340.0 eV D) 68.0 eV
The correct form of Ampere's law for circuits with gaps in them is
A.
.B.
.C.
.D.
.E.
.Power: A resistance heater is rated at 1200 W when operating at 110 V dc. What current will it draw?
A. 0.090 A B. 1.0 A C. 11 A D. 12 A
What is the importance of the carbon dioxide (CO2 ) cycle?
A) It makes the growth of continents possible. B) It allows for an ultraviolet-absorbing stratosphere. C) It regulates the carbon dioxide concentration of our atmosphere, keeping temperatures moderate. D) It will prevent us from suffering any consequences from global warming.