Glen is 35 years old and a little overweight. He - id3513831149, amoauya

Question

Physics: Glen is 35 years old and a little overweight. He is getting married in a few weeks and wants to lose a few pounds before the ceremony. He is extremely conscious of his weight. He has given up alcohol and stopped smoking, and he is now trying to cut down on fatty foods and sweets. He is finding it difficult to change his eating habits. His friend recently found him throwing up frequently after meals. Glen’s teeth are discolored, and his cheeks are swollen. Clearly, Glen is suffering from an eating

amoauya · Accepted Answer

The average dissipated power in a resistor in a ac circuit is:
$P=I_{rms}^2 R$
where R is the resistance, and $I_{rms}$ is the root mean square current, defined as
$I_{rms} = \frac{I_0}{\sqrt{2}}$
where I_0

is the peak value of the current. Substituting the second formula into the first one, we find
$P=( \frac{I_0}{\sqrt{2} } )^2 R = \frac{1}{2} I_0^2 R$
and if we re-arrange this formula and use the data of the problem, we can find the value of the peak current I0:
$I_0 = \sqrt{ \frac{2 P}{R} }= \sqrt{ \frac{2 \cdot 2.0 W}{47 \Omega} }=0.29 A$

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