On a PV diagram, 2 curves are plotted, both starting at the same point (P1, V1) and both ending at the same increased volume (V2). One curve is for an isothermal process; the other is for an adiabatic process. Except for the common starting point, which curve is the upper one?
a. The isothermal process curve will always be the upper one.
b. The adiabatic process curve will always be the upper one.
c. Since they start at the same point and end at the same volume, they will coincide.
d. The isothermal one will start out higher, but the adiabatic one will eventually cross it.
a
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Three point charges, two positive and one negative, each having a magnitude of 20 ?C are placed at the vertices of an equilateral triangle (30 cm on a side). What is the magnitude of the electrostatic force on the negative charge?
a. 80 N b. 40 N c. 69 N d. 57 N e. 75 N
Only very small amounts of infrared and ultraviolet light can penetrate all the way to the ground. Based on the diagram, which statement is true?
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Which of the following would correctly convert a Fahrenheit temperature (F) to a Kelvin (K) value?
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The device for measuring the electric potentials of the brain is called an
a. ECG c. EKG b. EBG d. EEG