That light has a dual nature is referring to light
a. having high- or low-energy photons.
b. acting as waves and particles.
c. having energy and momentum.
d. undergoing pair production.
b
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Imagine that allele "A" of a gene is present on the maternal chromosome and allele "a" is present on the paternal chromosome. When do the alleles "A" and "a" get separated into daughter cells? Does this occur after meiosis I or meiosis II, and why?
What will be an ideal response?
Which of the following best explains why the Sun's luminosity gradually rises over billions of years?
A) Fusion gradually decreases the number of independent particles in the core, allowing gravity to compress and heat the core, which in turn increases the fusion rate and the Sun's luminosity. B) Nuclear reactions in the Sun become more efficient with time, so that each fusion reaction releases more energy when the Sun is old than when it is young; this in turn raises the Sun's luminosity. C) The Sun's core gradually expands with time, and this expansion means there is more room for energy to be generated and hence increases the Sun's luminosity. D) The planets need more and more energy to maintain any life on them as time goes on, and therefore the Sun must bet hotter.
An object is placed 12 cm in front of a curved mirror. The magnification of the image is -3.0. What is the focal length of the mirror?
A) 12 cm B) 9.0 cm C) 24 cm D) 36 cm E) 16 cm
The notation s-1 means __________
Fill in the blank(s) with correct word