An ideal heat engine can have an efficiency of 1 if the temperature of the low temperature reservoir is
a. 0 K.
b. 0°C.
c. 0°F.
d. 0°R.
e. the same as the temperature of the heat source.
A
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What is stream channel geometry?
A) The change in elevation of a stream. B) The shape of a stream channel as seen on a map. C) The amount of turbulence and laminar flow in a stream. D) The cross-sectional area and cross-sectional shape of a stream channel.
_____ say that certain things cannot be created out of nothing or vanish into nothing
A) Conservation laws B) Laws of kinematics C) Laws of planetary motion D) Illuminance laws
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Indicate whether the statement is true or false
In a pure resistive circuit, the phase angle between current and voltage is
A) 0. B) ?/2 radians. C) -?/2 radians. D) ? radians. E) 3?/4 radians.