Most of the visible light from the sun originates in the photosphere
Indicate whether the statement is true or false
T
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Instructions: On occasion, the notation 
= [A, ?] will be a shorthand notation for 
.
The vector 
has components +5 and +7 along the x and y axes respectively. If the vector is now rotated 90 degrees counterclockwise relative to the original axes, the vector's components are now
A. ?7; ?5.
B. 7; ?5.
C. ?7; 5.
D. 7; 5.
E. 7; 0.
Photon Energy: What is the energy (in eV) of an optical photon of frequency 6.43 × 1014 Hz. (h = 6.626 × 10-34 J ? s, 1 eV = 1.60 × 10-19 J)
A. 2.66 eV B. 1.62 eV C. 1.94 eV D. 3.27 eV
Waves on a String: A rope with a total mass of 25.0 kg is tied to a tree on one side of a 125-m wide ravine. You are pulling on the other end of the rope with a force of 415 N. If you pluck the rope at your end, how long will it take the pulse to travel across the ravine to the tree?
Fill in the blank(s) with the appropriate word(s).
When the Moon appears on an observer's meridian at midnight, it is called a(n) ______________ moon
Fill in the blank(s) with correct word