In measurements made with spectroscopes, why is the light first sent through a narrow slit?
A) to increase the amount of light hitting the prism.
B) to produce narrow spectral lines on the screen
C) to increase the interference effects
D) to increase the bending effect by the prism
E) to produce broad--i.e., wide--spectral lines on the screen
B
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An LC circuit with an inductance of 36 mH and a capacitance of 25 mF will oscillate with what frequency?
A) 1.44 Hz B) 33 Hz C) 0.03 Hz D) 5.3 Hz E) 210 Hz
Current data from satellite measurements of temperature in the troposphere, despite errors in early data, reveal
A) remarkable agreement with surface temperatures. B) sharp differences with surface temperatures. C) no correlation between temperature and levels of greenhouse gases. D) a general cooling of global atmospheric temperatures.
To estimate the central temperature of the Sun, scientists
A) create a version of the Sun in a laboratory. B) use computer models to predict interior conditions. C) send probes to measure the temperature. D) monitor changes in Earth's atmosphere.
A space vehicle accelerates uniformly from 65 m/s at t = 0 to 162 m/s at t = 10.0 s. How far did it move between t = 2.0 s and t = 6.0 s?
What will be an ideal response?