The maria are really seas of long since hardened ________, a dark volcanic rock that also makes up the ocean basins of Earth
Fill in the blank(s) with correct word
basalt
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Light with a wavelength of 310 nm is incident on a metal that has a work function of 3.80 eV. What is the maximum kinetic energy that a photoelectron ejected in this process can have?
(1 eV = 1.60 × 10-19 J, c = 3.00 × 108 m/s, h = 6.626 × 10-34 J ? s) A) 0.62 × 10-19 J B) 0.21 × 10-19 J C) 0.36 × 10-19 J D) 0.48 × 10-19 J E) 0.33 × 10-19 J
If a gray opaque body has emissivity of 0.6, what is its reflectivity?
What will be an ideal response?
What conditions are necessary for a partial solar eclipse?
A) new moon on ecliptic, with us in the penumbral shadow B) full moon on equator, with us in the umbral shadow C) new moon at perigee D) full moon at apogee E) first or third quarter moon at a node
A pencil, two thumbtacks, and a loop of string with a circumference of 29 cm are used to draw an ellipse. How does the shape of the ellipse change as the distance between the two thumbtacks is increased?