Based on observations of the universal expansion, the age of the universe is about ________
A) 14,000 years B) 14 billion years C) 14 million years D) 14 trillion years
B
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A thin lens has a focal length of 10.00 cm for blue light. If the index of refraction for the lens material tends to decrease with increasing wavelength, what is the focal length of the lens for red light?
a. more than 10.00 cm b. It depends on whether the lens is converging or diverging. c. also 10.00 cm d. less that 10.00 cm
Magnetic flux depends upon
A) the magnetic field. B) the orientation of the area with respect to the field. C) the area involved. D) all of the above E) none of the above
Because the changes in energy levels happen in discrete steps, we refer to these as ________ leaps
Fill in the blank(s) with correct word
An ideal gas is allowed to expand adiabatically. Assume the process is reversible. The change in entropy is
a. 0 b. nR ln (V2/V1) c. nR ln (T2/T1) d. kn ln (V2/V1) e. kn ln (T2/T1)