PHLA10H3 : Review #3

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mauvedonkey369

18 Apr 2011

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Phl a10 - exercise iii: here"s a little logical puzzle: you are in a strange land where everyone is either a knight or a knave. Knights always tell the truth; knaves always lie. You meet two of them, a and b. A is a knave, and b is a knight. If a were a knight, then he would have to be telling the truth. He would be saying that they were both knaves, but knaves always lie, hence this logic does not follow through. A were a knave, then he is lying about both of them being knaves. Since the statement is false, there is the possibility that b is be a knight, while a is a knave. A would be lying about both of them being knaves, but it does not mean that one of them cannot be a knave. Aquinas described god as being a person who was omnipotent, omniscient, and omni-benevolent.

Related Questions

CHARGING BY INDUCTION:

Conductor A (positively charged) is brought nearby to conductor B(initially uncharged). We will use object A to charge object B byinduction.

In order to successfully charge object B, all of the following mustbe done:

a.) Which object needs to be connected to ground (at some time inthe process) in order for this to work?

Choose one answer:
1. A only
2. B only
3. Both A and B
4. Neither A or B
5. Not enough info

b.) During this connection, electrons will flow:
Choose one answer:
1. From A into the ground
2. From the ground into A
3. From B into the ground
4. From the ground into B
5. From A onto B
6. From B onto A
7. Not enough info

c.) When should B be disconnected to the ground?
Choose one answer:
1. Before A is taken away
2. After A is taken away
3. B will be charged the same way regardless
4. B does not need to be connected to ground at all
5. Not enough info

d.) If A is brought closer to B during this process (rather thanfurther away), then the amount of charge that can be generated on Bis:

Choose one answer:
1. Larger
2. Smaller
3. The same
4. Not enough info

e.) More generally, when charging an object by induction, theinitially uncharged object will always end up:

Choose one answer:
1. Negatively charged
2. Positively charged
3. With the opposite charge as the object used to charge it
4. With the same charge as the object used to charge it
5. There is no general statement that can be made about this

POTENTIAL MISHAPS:
f.) If, during an otherwise correct procedure, A were accidentallytouched to B while B is connected to the ground, then:

*The net charge on A would end up:
Choose one answer:
1. Positive
2. Negative
3. Zero
4. Not enough info

*The net charge on B would end up:
Choose one answer:
1. Positive
2. Negative
3. Zero
4. Not enough info

(Can you see why our attempt to charge B has failed?)

g.) If, during an otherwise correct procedure, B was disconnectedfrom ground only after A was taken far away, then:

*the net charge on A would end up:
Choose one answer:
1. Positive
2. Negative
3. Zero
4. Not enough info

*the net charge on B would end up:
Choose one answer:
1. Positive
2. Negative
3. Zero
4. Not enough info

(Can you see why our attempt to charge B has failed?)

PHLA10H3 : Review #3

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