# Physics Coursework

الكاتب : tormendor   المشاهدات : 486   الردود : 3    ‏2006-09-10
مشاركة رقم : 1    ‏2006-09-10
1. ### tormendorعضو

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Some time ago I received a call from a colleague, who asked if I would be the referee on the grading of an examination question. He was about to give a student a zero for his answer to a physics question, while the student claimed he should receive a perfect score and would if the system were not set up against the student. The instructor and the student agreed to an impartial arbiter, and I was selected. I went to my colleague's office and 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."

"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 S=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. In 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. "Oh, yes," said the student.

"There are many ways of getting the height of a tall building with the aid of a barometer. For example, you could take the barometer out on a sunny day and measure the height of the barometer, the length of its shadow, and the length of the shadow of the building, and by the use of simple proportion, determine the height of the building."

"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 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."

"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, to use the "scientific method," and to explore the deep inner logic of the subject in a pedantic way, as is often done in the new mathematics, rather than teaching him the structure of the subject. With this in mind, he decided to revive scholasticism as an academic lark to challenge the Sputnik-panicked classrooms of America.

2.   مشاركة رقم : 2    ‏2006-09-10
3. ### tormendorعضو

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Weighing Problem

A girl holding a baby walks into a drug store and asks the clerk if she can use the store's baby scale.

"Sorry, ma'am," says the clerk. "Our baby scale is broken. But we can figure the baby's weight if we weigh mother and baby together on the adult scale, and then weigh the mother alone, and subtract the second number from the first."

"Oh, that won't work," says the girl.

"Because," she answers, "I'm not the mother - I'm the aunt."

4.   مشاركة رقم : 3    ‏2006-09-13
5. ### AboYafiعضو

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U r not the Mom
Ur the Aunt
That's all i understood

P.S. The Post Is too Long

Thankx

6.   مشاركة رقم : 4    ‏2006-09-13
7. ### tormendorعضو

التسجيل :
‏2006-07-14
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these are two different stories.

the first one is about the how the student solved the problem in many ways other than the teacher way

they all interesting