Why does a filtergram reveal details in higher layers of the solar atmosphere?
What will be an ideal response?
A filtergram is an image of the Sun made using light only at the wavelength of a strong absorption line to reveal detail in the upper regions of the chromosphere.
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Suppose that the Sun shrank in size but that its mass remained the same. What would happen to Earth's orbit?
A) The size of Earth's orbit would shrink, and it would take less than one year to orbit the Sun. B) Earth's orbit would expand, and it would take more than one year to orbit the Sun. C) Earth's orbit would be unaffected. D) Earth would change from a bound orbit to an unbound orbit and fly off into interstellar space.
Like charges _________, unlike charges __________
Fill in the blank(s) with correct word
A uniform rod is 2.0 m long. The rod is pivoted about a horizontal, frictionless pin through one end. The rod is released from rest at an angle of 30° above the horizontal. What is the angular acceleration of the rod at the instant it is released?
A. 4.7 rad/s2 B. 6.9 rad/s2 C. 6.4 rad/s2 D. 5.6 rad/s2 E. 4.2 rad/s2
If a metal had a Fermi level (energy) of 5.0 eV, what would be the average energy of the electrons at 0 K?
A) 5.0 eV B) 3.0 eV C) 8.0 eV D) 6.0 eV E) 0.00 eV