Uranus rotates on an axis that is inclined 98.0° from the perpendicular to its orbit
a. True
b. False
Indicate whether the statement is true or false
True
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Suppose you look at a detailed spectrum of visible light from some object. How can you decide whether it is an emission line spectrum or an absorption line spectrum?
A) An emission line spectrum consists of bright lines on a dark background, whereas an absorption line spectrum consists of dark lines on a rainbow background. B) An emission line spectrum consists of a long bright line, whereas an absorption line spectrum consists of a long dark line. C) The only way to decide is to make a graph of the intensity of the light at every wavelength, and then analyze the graph carefully. D) The emission line spectrum is produced by electrons jumping up in energy level, whereas the absorption line spectrum is produced by electrons jumping down in energy level.
On average, active galaxies are rare and most are fairly distant from us
Indicate whether the statement is true or false
To determine the location of the center of mass of a car, the car is driven over a scale on a horizontal floor
When the front wheels are over the scale, the weight recorded by the scale is 5800 N, and when the rear wheels are over the scale, the scale reads 6500 N. The distance between the front and rear wheels is measured to be 3.20 m. How far behind the front wheels is the center of mass located? A) 0.845 m B) 1.50 m C) 1.59 m D) 1.69 m E) 1.72 m
A hydrogen atom is excited to the n = 11 level. Its decay to the n = 7 level is detected in a photographic plate. What is the wavelength of the light photographed? (c = 3.00 × 108 m/s, 1 eV = 1.60 × 10-19 J, h = 6.626 × 10-34 J ? s)
A) 7,510 nm B) 4,670 nm C) 12,400 nm D) 4,380 nm