Which of the following is evidence that convection occurs in the layers just below the Sun's photosphere?
a. Sunspots appear to be cooler than their surroundings.
b. Solar prominences lift large loops of gas into the chromosphere and corona.
c. The solar wind emits large numbers of charged particles.
d. The Sun rotates differentially.
e. The centers of granules are hot and moving upward away from the center of the Sun.
e
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A 10.0-?F capacitor is plugged into a 110 V rms 60.0-Hz voltage source, with an ammeter in series. What is the rms value of the current through the capacitor?
a. 0.202 A (rms) b. 0.415 A (rms) c. 0.626 A (rms) d. 0.838 A (rms) e. 0.066 A (rms)
Which of the following objects can’t be accelerating?
1.an object moving with a constant speed 2.an object moving with a constant velocity 3.an object moving with along a curve
Name the primary and secondary colors of the additive theory of light
When you look at a single slit diffraction pattern produced on a screen by light of a single wavelength, you see a bright central maximum and a number of maxima on either side, their intensity decreasing with distance from the central maximum. If the width of the slit is increased,
a. the pattern shrinks in size. (central maximum less wide; other maxima in closer to it) b. the pattern increases in size. (central maximum wider; other maxima farther from it) c. it does not affect the size of the pattern. d. the width of the central maximum increases, but the other maxima do not change in position or width. e. the width of the central maximum decreases, but the other maxima do not change in position or width.