A person looking through eyeglasses sees real images
Indicate whether the statement is true or false
F
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Consider the n = 9 shell. (a) What is the largest value of the orbital quantum number, l, in this shell? (b) How many electrons can be placed in this shell?
What will be an ideal response?
Optics of the Eye: A person's near point is 25 cm, and her eye lens is 2.7 cm away from the retina. What must be the focal length of this lens for an object at the near point of the eye to focus on the retina?
A. -3.4 cm B. -2.4 cm C. 2.4 cm D. 3.4 cm E. 2.6 cm
A medium-mass star evolves into a red giant because ____
a. the core expands as new fusion products collect there b. the surface of the star becomes cooler c. energy from hydrogen shell burning and helium fusion forces the outer layer to expand d. the surface of the star becomes hotter e. increased stellar winds carry large amounts of material off of the surface of the star
What is characteristic of a main sequence star?
A) It has a mass less than the Sun's. B) It has rapid rotation and a strong stellar wind. C) Nuclear fusion in the core varies due to the amount of gravitational contraction that occurs and which heavy elements are produced. D) The rate of nuclear energy generated in the hydrogen to helium fusing core equals the rate radiated from the surface. E) All of the above are correct.