The three laws dealing with the creation of various spectra are due to:
A) Newton.
B) Fraunhofer.
C) Kirchhoff.
D) Bohr.
E) Einstein.
C
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A resistor and capacitor are connected in series with an applied AC voltage source. Separate voltmeter readings across the resistor and capacitor give values of 50 V and 60 V (rms), respectively. What is the effective (rms) voltage of the source?
a. 78 V c. 110 V b. 90 V d. 25 V
Photoreceptors commonly called cone cells respond to:
a. Red, Yellow, and Blue b. Cyan, Magenta, and Yellow c. Red, White, and Blue d. Red, Green, and Blue
Why does a particular gas cloud in the constellation Orion appear red?
A) The atoms in the cloud have electrons that are primarily red. B) The cloud must be made up of neon and nothing else. C) The cloud must be made of some element or elements that give off red emission lines. D) The solid metal inside the cloud is heated to 1000 Kelvin. E) The gas in the cloud is emitting all colors, but our telescopes only detect red light.
A 6.00-m length of rope has a mass of 700 g. It is pulled taught with a force of 100 N. What is the speed of waves on the rope?
A) 29.3 m/s B) 11.7 m/s C) 42.0 m/s D) 3.42 m/s E) 4.20 m/s