A compound optical microscope or just a optical microscope is a microscope that uses light and has more than one lens.
Answer:
The horizontal range will be 
Explanation:
We have given initial speed of the shell u = 
Angle of projection = 51°
Acceleration due to gravity 
We have to find maximum range
Horizontal range in projectile motion is given by

So the horizontal range will be 
Diffuse reflection have a great day
Volume will decrease if the heat remains constant
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