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The Student and The Barometer

Some time ago I received a call from a colleague. He was about to give a student a zero for his answer to a physics question, while the student claimed a perfect score. The instructor and the student agreed to an impartial arbiter, and I was selected.

I read the examination question: "Show how it is possible to determine the height of a tall building with the aid of a barometer." The student had answered: "Take the barometer to the top of the building, attach a long rope to it, lower it to the street, and then bring it up, measuring the length of the rope. The length of the rope is the height of the building."

The student really had a strong case for full credit since he had really answered the question completely and correctly! On the other hand, if full credit were given, it could well contribute to a high grade in his physics course and certify competence in physics, but the answer did not confirm this.

I suggested that the student have another try. I gave the student six minutes to answer the question with the warning that the answer should show some knowledge of physics. At the end of five minutes, he hadn't written anything. I asked if he wished to give up, but he said he had many answers to this problem; he was just thinking of the best one. I excused myself for interrupting him and asked him to please go on.

In the next minute, he dashed off his answer, which read: "Take the barometer to the top of the building and lean over the edge of the roof. Drop the barometer, timing its fall with a stopwatch. Then, using the formula x=0.5*a*t^2, calculate the height of the building." At this point, I asked my colleague if he would give up. He conceded, and gave the student almost full credit.

While leaving my colleague's office, I recalled that the student had said that he had other answers to the problem, so I asked him what they were. "Well," said the student, "there are many ways of getting the height of a tall building with the aid of a barometer. For example,if the sun is shining you could measure the height of the barometer, then set it on end and measure the length of its shadow. Then you measure the length of the skyscraper's shadow, and thereafter it is a simple matter of proportional arithmetic to work out the height of the skyscraper.

"Fine," I said, "and others?"

"Yes," said the student, "there is a very basic measurement method you will like. In this method, you take the barometer and begin to walk up the stairs. As you climb the stairs, you mark off the length of the barometer along the wall. You then count the number of marks, and this will give you the height of the building in barometer units." "A very direct method."

"Of course. If you want a more sophisticated method, you can tie the barometer to the end of a string, swing it as a pendulum, and determine the value of g [gravity] at the street level and at the top of the building. From the difference between the two values of g, the height of the building, in principle, can be calculated."

"On this same tack, you could take the barometer to the top of the building, attach a long rope to it, lower it to just above the street, and then swing it as a pendulum. You could then calculate the height of the building by the period of the precession".

"Finally," he concluded, "there are many other ways of solving the problem. Probably the best," he said, "is to take the barometer to the basement and knock on the superintendent's door. When the superintendent answers, you speak to him as follows: 'Mr. Superintendent, here is a fine barometer. If you will tell me the height of the building, I will give you this barometer."

At this point, I asked the student if he really did not know the conventional answer to this question. He admitted that he did, but said that he was fed up with high school and college instructors trying to teach him how to think.

The name of the student was Niels Bohr, who later received the Nobel prize for Physics.

Arguing effectively
How to Argue Effectively

I argue very well. Ask any of my remaining friends. I can win an argument on any topic, against any opponent. People know this and steer clear of me at parties. Often, as a sign of their great respect, they don't even invite me. You too can win arguments. Simply follow these rules:

-=- Make things up.

Suppose, in the Peruvian economy argument, you are trying to prove that Peruvians are underpaid, a position you base solely on the fact that YOU are underpaid, and you are not going to let a bunch of Peruvians be better off. DON'T say: "I think Peruvians are underpaid." Say instead: "The average Peruvian's salary in 2004 dollars adjusted for the revised tax base is $1,452.81 per annum, which is $836.07 before the mean gross poverty level."

NOTE: Always make up exact figures.

If an opponent asks you where you got your information, make THAT up too. Say: "This information comes from Dr. Hovel T. Moon's study for the Buford Commission published on May 9, 2005. Didn't you read it?" Say this in the same tone of voice you would use to say, "You left your soiled underwear in my bathroom."

-=- Use meaningless but weighty-sounding words and phrases.

Memorize this list:

Let me put it this way

In terms of

Vis-a-vis

Per se

As it were

Qua

So to speak

You should also memorize some Latin abbreviations such as "Q.E.D.", "e.g.", and "i.e." These are all short for "I speak Latin, and you don't."

Here's how to use these words and phrases. Suppose you want to say, "Peruvians would like to order appetizers more often, but they don't have enough money."

You never win arguments talking like that. But you WILL win if you say, "Let me put it this way. In terms of appetizers

vis-a-vis Peruvians qua Peruvians, they would like to order them more often, so to speak, but they do not have enough money per se, as it were. Q.E.D."

Only a fool would challenge that statement.

-=- Use snappy and irrelevant comebacks.

You need an arsenal of all-purpose irrelevant phrases to fire back at your opponents when they make valid points. The best are:

You're begging the question.

You're being defensive.

Don't compare apples to oranges.

What are your parameters?

This last one is especially valuable. Nobody (other than engineers and policy wonks) has the vaguest idea what "parameters" means.

Don't forget the classic: YOU'RE SO LINEAR.

Here's how to use your comebacks:

You say: As Abraham Lincoln said in 1873...

Your opponent says: Lincoln died in 1865.

You say: You're begging the question.

You say: Liberians, like most Asians...

Your opponent says: Liberia is in Africa.

You say: You're being defensive.

-=- Compare your opponent to Adolf Hitler.

This is your heavy artillery, for when your opponent is obviously right and you are spectacularly wrong. Bring Hitler up subtly.

Say, "That sounds suspiciously like something Adolf Hitler might say," or "You certainly do remind me of Adolf Hitler."



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