Spectra for the Cygnus loop and the Orion nebula are shown above. Judging from their spectra, how would these two objects look to the naked eye (assuming they were bright enough for colors to be distinguished)?
A) The Cygnus loop would appear red, and the Orion nebula would appear blue.
B) The Cygnus loop would appear red, and the Orion nebula would appear red.
C) The Cygnus loop would appear blue, and the Orion nebula would appear blue.
D) The Cygnus loop would appear blue, and the Orion nebula would appear red.
D
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Phase Angles: A 200-? resistor, a 40-mH inductor, and a 2.0-?F capacitor are connected in series with a 120-V rms source at 1.0 kHz. What is the phase angle of this circuit?
A. 49° B. 90° C. 41° D. 0° E. 45°
Gravity follows an inverse square law. This means that if the distance between two masses is decreased by a factor of 4, the gravitational force between those two masses
A) increases by a factor of 16. B) increases by a factor of 4. C) increases by a factor of 2. D) decreases by a factor of 4. E) decreases by a factor of 16.
We expect a scientific theory to be able to make predictions that can be tested. Which of the following is a prediction of the nebular theory that has been verified by observations?
a. Large planets should have at least some moons that are larger than the smallest planets. b. Planetary orbits should lie in approximately the same plane as the disk of the Milky Way Galaxy. c. Earth-size planets should have fairly large moons. d. Many stars should have planets.
The peak of a body's blackbody radiation curve shifts toward longer wavelength as the temperature of the body increases
Indicate whether the statement is true or false