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Ph 213 Chapter Notes -Virtual Image

United States

General Physics (with Calculus

Physics

Dr.Parrah

Portland State University

Dynamics

<p>The length of a lunar month is roughly 28 days. If the moon werelocated farther from the Earth than it presently is, the lunarmonth would be<br>Choose one answer.<br>a. more than 28 days.<br>b. not enough information given.<br>c. roughly 28 days.<br>d. less than 28 days.<br></p>

<div>The resistance of No.28 copper wire is 0.00213Î©/cm. Theresistivity of the cdommercial copper is1.72E-8 Î©m. Find:</div> <div>a. the diameter of No.28 copper wire</div> <div>b. the heat power generated on a 12-m No.28 copper wire whenitis connected to a 1.5 V battery (Neglect the internal resistanceofthe battery.).</div>

<div>The isotope Si-28 has a mass of 27.977 amu.</div>
<div> </div>
<div>For ten grams of Si-28, calculate</div>
<div> </div>
<div>(a) the number of atoms</div>
<div> </div>
<div>(b) the total number of protons, neutrons, and electrons. </div>
<p> </p>

Ph 213 Chapter Notes -Virtual Image

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