When a certain simple pendulum is set swinging, its angular displacement ? as a function of time t obeys the equation ? = 8.5° cos(2.4 s-1t). How long is the pendulum?
What will be an ideal response?
1.7 m
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What does it mean for an atom to be ionized?
a. An atom is only considered ionized if it has *fewer* bounded electrons than protons, causing it to have a net positive charge. b. An atom is only considered ionized if it has *more* bounded electrons than protons, causing it to have a net negative charge. c. An atom is only considered ionized if it has more or fewer bounded electrons than protons, causing it to have a non-zero charge. d. An atom is only considered ionized if it has the same number of bounded electrons and protons, causing it to have a neutral, or net zero charge.
Shown here is a schematic of Young's experiment that demonstrated the interference of light. What is the role of slit S? (See pages 385–386 in your textbook for more on this experiment.)
a. It focuses the light from the broad beam source. b. It forms a pattern of waves so that the light arriving at the silt S1 is "in step" with light arriving at S2. c. It serves as an object whose image appears as a line on the screen. d. It forms an image of the light source. e. It separates the colors that are then focused by the double slit.
When light of wavelength 450 nm falls on a single slit of width 0.30 mm, what is the angular width of the central bright region?
A) 0.086° B) 0.13° C) 0.17° D) 0.26° E) 0.35°
At what, if any, temperature are the numerical readings on the Fahrenheit and Celsius scales the same?
A) -30° B) -40° C) -50° D) -60° E) They can never read the same because they are based on different zeroes.