You can hear sound through an open window from sources that are not in your line of sight because of __________
Fill in the blank(s) with correct word
diffraction
Physics & Space Science
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A stage 4 object can be plotted on the H-R diagram. At this stage, the star will appear:
A) in the middle left of the diagram. B) in the middle right of the diagram. C) just on the bottom right of the main sequence. D) down and to the left of where it will be when it is a main sequence star. E) in the middle of the main sequence.
Physics & Space Science
What is the mass defect of an alpha particle?
a. 
b. 
c. 
d. 
Physics & Space Science
The _______________ model explains pulsars using beams of radiation that sweep around the sky
Fill in the blank(s) with correct word
Physics & Space Science
When the reflection of an object is seen in a plane mirror, the image is
a. real and upright. b. real and inverted. c. virtual and upright. d. virtual and inverted.
Physics & Space Science