Suppose the laboratory wavelength of a spectral line is 600 nm. In a star it is measured to be 599.4 nm. Is the star moving toward or away from us, relative to the line of sight? How fast is it moving? (Hint: c = 300,000 km/s)
a. toward; 300 km/s
b. away; 300 km/s
c. at rest; 0 km/s
d. sideways; 300 km/s
e. toward; 150 km/s
a
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Angular and Linear Quantities: A car is traveling along a freeway at 65 mph. What is the linear speed, relative to the highway, of each of the following points on one of its tires?(a) the highest point on the tire(b) the lowest point on a tire(c) the center of the tire
What will be an ideal response?
If the sound level increases by 20 decibels, by about how much has the intensity of sound (in W/m2) increased?
A. 2 times B. 10 times C. 20 times D. 100 times E. 200 times F. Some other factor (specify)
Find the pressure in atmospheres in the water at the base of Dworshak Dam if the water in the reservoir is 200 meters deep. (1.01 × 105 N/m2 = 1 atm.)
A. 20.4 atm B. 24.7 atm C. 29.4 atm D. 194 atm E. 75 atm
A monatomic ideal gas is compressed adiabatically to one-third of its initial volume. The resulting pressure will be
A) three times as large as the initial value. B) less than three times as large as the initial value. C) more than three times as large as the initial value. D) equal to the initial value. E) impossible to predict on the basis of this data.