The look-back time is numerically equal to the distance to a galaxy in light-years
Indicate whether the statement is true or false
T
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A(n) ______ is a miniature version of an image that links to a larger image.
A. bitmap B. thumbnail C. graphical display D. fingerprint
Two point charges of +20.0 ?C and -8.00 ?C are separated by a distance of 20.0 cm. What is the magnitude of electric field due to these charges at a point midway between them? (k = 1/4??0 = 8.99 × 109 N • m2/C2)
A) 25.2 × 106 N/C directed toward the negative charge B) 25.2 × 106 N/C directed toward the positive charge C) 25.2 × 105 N/C directed toward the negative charge D) 25.2 × 105 N/C directed toward the positive charge E) 25.2 × 104 N/C directed toward the negative charge
The point in the sky directly above an observer's head is called the ______________
Fill in the blank(s) with correct word
Which of the following does NOT reveal information about conditions on the early Earth?
A) the fossil record B) the sedimentary rocks found on the most ancient exposures in Greenland C) laboratory simulations of the primordial ocean and atmosphere D) advanced experiments on amino acids E) evidence gleaned from other planets in the early stages of their evolution