<span>You will exert less force the more the lever is longer. So, you need to place your hands as high as possible with the hammers handle.</span>
Answer:
The effect of gravity on object makes objects stable and not floating in the air . It also makes any object thrown up to return back
Answer:
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Explanation:
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The optical fibers are thin, thus, the light entering from one side of the wire surface has more chances to reflect back from the inside surface due to the larger angle of incidence.
The angle of the strike is large due to the small size of the wire and this angle is greater than the critical angle.
As the angle of the incident light on the inside surface is greater than the critical angle, thus, the total internal reflection of the takes place.
Hence, there are more chances of total internal reflection of light inside the optical fiber wire than the emergence of light through the wire.
Answer:
The total resistance decreases
Explanation:
The total resistance of a parallel circuit is given by:
where R1, R2, etc. are the individual resistances.
We notice that if we add one more resistor in parallel, we add another positive term 
to the sum, therefore the term 
increases. However, this term is the reciprocal of the total resistance: therefore, this means that the total resistance will decrease.
