A 2.0-mol ideal gas system is maintained at a constant volume of 4.0 L. If 200 J of heat is added, what is the work done on the system?
a. zero
c. –6.7 J
b. 5.0 J
d. 20 J
A
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Some young star clusters contain large numbers of T Tauri stars
Indicate whether the statement is true or false
Which of the following is FALSE?
a) Light, radio, ultraviolet, and gamma rays are all forms of electromagnetic radiation. b) Emission spectra are characterized by narrow, bright lines of different colors. c) An absorption spectrum appears as a continuous spectrum interrupted by a series of dark lines. d) The energy of a photon is inversely proportional to the wavelength of the radiation. e) The wavelengths of the emission lines produced by an element are different from the wavelengths of an absorption line produced by the same element.
Total Internal Reflection: Light enters a substance from air at 30.0° to the normal. It continues within the substance at 23.0° to the normal. What is the critical angle for this substance when it is surrounded by air?
A. 53° B. 51.4° C. 36.7° D. 12.6°
Consider a student whose mass is 70 kg. If all his mass were converted to electrical energy, for how many years could he keep a 100-W light bulb burning? (c = 3.0 × 108 m/s)
What will be an ideal response?