Answer:
The magnification is 
Explanation:
From the question we are told that
The power of the lens is 
Generally 
The object distance is
the negative sign is because the distance is measured in the opposite direction of incident light (i.e away )
Generally the focal length is mathematically represented as
=>
=> 
converting to cm
=> 
Generally from lens equation we have that

=> 
=> 
Generally the magnification is mathematically represented as

=> 
=> 
It's probably because there is no gravity which ballpoint pens need for inkflow to the tip.
Explanation:
Electromagnetic waves are waves that propagate through space while an electric field and a magnetic field interact with each other.
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Answer:
gdgdrhhdhhsbsnjsjdgjdjdjsbdubjdbfn
Explanation:
nnndhdhjdjddjrjjdkdnfidjdbdjbdksjd
Scalar quantities have only a magnitude. So the answer is scalar quantities.