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Electrostatics: Summary
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<strong><font face="Verdana, Arial, Helvetica, sans-serif" size="5" color="#FFFFFF">Electrostatics:</font></strong><font face="Verdana, Arial, Helvetica, sans-serif" size="5" color="#FFFFFF">
Summary</font>
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<img src="chargeMainIdea.png" width="98" height="58">
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<td>
<font size="4" face="Verdana, Arial, Helvetica, sans-serif">In this
activity you explored Coulomb's Law. Coulomb's Law reveals that
opposite charged particles attract to each other and particles with
the same sign of charge repel each other. In addition you found out
that Coulomb's force between a pair of particles is determined by
the distance and the charge of each particle. Please answer the
questions below to summarize what you have learned. </font>
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-282012
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<body marginheight="5" face="Verdana" marginwidth="5" bgcolor="rgb(230, 230, 230)">
<input type="submit" script="script:mw2d:1:stop immediately;reset;
set %charge 1;
set %dx %atom[1].rx-%atom[1].sigma/2-%line[2].x2;
set %dy %atom[1].ry-%line[2].y2;
select line 2;
move (%dx, %dy);
select textbox 0-3;
move (%dx, %dy);
select line none;
select textbox none;
delay 0.5;
set atom[1].charge %charge;
set atom[2].charge %charge;
select textbox 0,1;
move (-100, 0);
select textbox none;
delay 0.5;
select line 2;
move (-10, 0);
select textbox 2,3;
move (-10, 0);
select line none;
select textbox none;
run;" value="Charge (amount A)">
<input type="submit" script="script:mw2d:1:stop immediately;reset;
set %charge 1.5;
set %dx %atom[1].rx-%atom[1].sigma/2-%line[2].x2;
set %dy %atom[1].ry-%line[2].y2;
select line 2;
move (%dx, %dy);
select textbox 0-3;
move (%dx, %dy);
select line none;
select textbox none;
delay 0.5;
set atom[1].charge %charge;
set atom[2].charge %charge;
select textbox 0,1;
move (-100, 0);
select textbox none;
delay 0.5;
select line 2;
move (-10, 0);
select textbox 2,3;
move (-10, 0);
select line none;
select textbox none;
run;" value="Charge (amount B)">
<input type="submit" script="script:mw2d:1:stop immediately;reset;
set %charge 2.5;
set %dx %atom[1].rx-%atom[1].sigma/2-%line[2].x2;
set %dy %atom[1].ry-%line[2].y2;
select line 2;
move (%dx, %dy);
select textbox 0-3;
move (%dx, %dy);
select line none;
select textbox none;
delay 0.5;
set atom[1].charge %charge;
set atom[2].charge %charge;
select textbox 0,1;
move (-100, 0);
select textbox none;
delay 0.5;
select line 2;
move (-10, 0);
select textbox 2,3;
move (-10, 0);
select line none;
select textbox none;
run;" value="Charge (amount C)">
<input type="submit" script="script:mw2d:1:stop immediately;reset;
set %charge 0.5;
set %dx %atom[1].rx-%atom[1].sigma/2-%line[2].x2;
set %dy %atom[1].ry-%line[2].y2;
select line 2;
move (%dx, %dy);
select textbox 0-3;
move (%dx, %dy);
select line none;
select textbox none;
delay 0.5;
set atom[1].charge %charge;
set atom[2].charge %charge;
select textbox 0,1;
move (-100, 0);
select textbox none;
delay 0.5;
select line 2;
move (-10, 0);
select textbox 2,3;
move (-10, 0);
select line none;
select textbox none;
run;" value="Charge (amount D)">
<br>
<strong>Which amount is greatest? Explain how you can tell.</strong>
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<font size="4" face="Arial, Helvetica, sans-serif"><img src="chargetravel.gif">
<strong>Suppose you shot an electron into the container pictured. The
container has a particle that has a negative charge. Describe the path the
electron will follow and why it follows this path.</strong></font>
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<strong><font size="4" face="Arial, Helvetica, sans-serif">Particle A has
a charge of +3 and particle B a charge of -3. They are 4 nm apart from
each other. How would the forces change if the distance was halved?
Explain your answer. (❏ <a href="script:page:0:message <t><font face=verdana>Use the equation of Columb force for help:<br><br>F=kQ<sub>1</sub>Q<sub>2</sub>/r<sup>2</sup></t>">Hint</a>)</font></strong>
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<img src="pointcharge.gif">
<br>
<br>
<strong><font size="4" face="Arial, Helvetica, sans-serif">Two positively
charged particles, 1 and 2, are placed on a line. A third particle, 3, is
placed on the line and it starts to move towards the particle on the
right. What is the charge of the third particle? Why does it travel
towards the right? Choose all that are possible.</font></strong>
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<html>It is negative; it was closer to particle on right.</html>
<html>It is negative; particle on right had a stronger charge.</html>
<html>It is negative; particle on left had a stronger charge.</html>
<html>It is positive; it was midway between the particles.</html>
<html>It is positive; it was closer to particle on right.</html>
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<strong><font size="4" face="Arial, Helvetica, sans-serif">Suppose the
Coulomb force is the main force responsible for most interactions between
atoms and molecules. The Coulomb force gets weaker at further distance.
What can you guess about the forces between molecules in a gas versus the
forces between molecules in a liquid?</font></strong>
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<p align="center" class="firstp">
<strong>You have reached the end of the activity.<br>Please submit a
report.</strong>
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-282012
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Electrostatics
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