What percentage of 20 kilogram is 7 gram 500 gram
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The phenomenon of ejection of electrons from the surface of a metal when light of suitable frequency strikes on it, is called photoelectric effect. The emitted electrons are called photoelectrons.”10-Aug-2016
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What is photoelectric effect?
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We know to find the percentage of a quantity x is given by :
\%=\dfrac{Q}{value}\times 100%=valueQ×100
Here , Q = 500 g = 0.5 kg .
value = 2 kg .
Putting the value of These in above equation .
We get :
\begin{gathered}\%=\dfrac{0.5}{2}\times 100\\\\\%=25\ \%\end{gathered}%=20.5×100%=25 %
Therefore , the answer is 25 % .
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