The angle measured from the horizon to the line of sight to the celestial object is called the ______________
Fill in the blank(s) with correct word
altitude
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Star clusters have been observed within dark nebulae with:
A) optical movies made over decades. B) radio interferometers. C) infrared observations. D) the Chandra X-ray observatory. E) ultraviolet light creating the emission nebulae.
Explain the basic principle behind the VLA
What will be an ideal response?
Five equal negative charges are uniformly spaced in a semicircular arc of radius r0 with its center at the origin. The charges positions in polar coordinates are given by (r0, ?i), where the values of ?i are 0°, 45°, 90°, 135°, and 180°. At the position (x, y) = (r0, –r0) in the 4th quadrant, which statement best describes the direction of the resulting electric field?
a. The direction is that of a 4th quadrant angle. b. The direction is that of a 3rd quadrant angle. c. The direction is that of a 1st quadrant angle. d. The direction is that of a 2nd quadrant angle.
The color of a firework comes from the glowing of
A) molecules. B) atoms. C) gun powder. D) laser light.