How many constellations are on a celestial sphere? How many boundaries are on a celestial sphere? Are boundaries unique to a constellation or shared?
What will be an ideal response?
88 constellations, 88 boarders, shared
Physics & Space Science
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What is the direction of 
at point P?
A. A B. B C. C D. D E. E F. F T. Zero
Physics & Space Science
A scientific model can never be exactly correct
Indicate whether the statement is true or false
Physics & Space Science
Double-Slit Interference: A double-slit experiment uses coherent light of wavelength 633 nm with a slit separation of 0.100 mm and a screen placed 2.0 m away.(a) How wide on the screen is the central bright fringe?(b) What is the distance on the screen between first-order and second-order bright fringes?(c) What is the angular separation (in radians) between the central maximum and the first-order maximum?
What will be an ideal response?
Physics & Space Science
The sum of vectors A and B is
a. 
b. 
c. 
d. 
Physics & Space Science