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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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?
A) A small percentage of the incoming light at every infrared and ultraviolet wavelength reaches the ground, while the remaining light at the same wavelengths does not reach the ground. B) Most infrared and ultraviolet wavelengths do not reach the ground at all; the only wavelengths that do are the ones closest to the visible portion of the spectrum. C) Most infrared and ultraviolet wavelengths do not reach the ground at all; the only wavelengths that do are the ones closest to the radio and x-ray portions of the spectrum.
Which of the following would correctly convert a Fahrenheit temperature (F) to a Kelvin (K) value?
A) K = (5/9)(F - 32) B) K = (5/9)F + 255 C) K = (5/9)F - 273 D) K = (9/5)F + 273 E) K = (9/5)(F - 32 ) + 273
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
The device for measuring the electric potentials of the brain is called an
a. ECG c. EKG b. EBG d. EEG