PHYS 101 : 2000 answers.pdf

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goldhedgehog288

11 Oct 2012

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PHYS 101 Full Course Notes

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This part of the examination comprises questions 1 to 20. For each of the 20 multiple-choice questions, blacken the letter that corresponds to your answer. This part of the exam comprises questions 21 to 30. Water nair = 1. 00 nwater = 1. 33 ndiamond = 2. 42. Answer: the angle of refraction r inside the diamond is: ________________________ . Answer: the distance of the image from the magnifying glass is: _________________ cm. Answer: the focal length of the second lens is: ________________________ cm. Answer: the height of the image is: ________________________ cm. Answer: the magnitude of the tension in the cable is: _______________ n. Answer: the displacement at the end of 25 seconds is: __________________ m. Answer: the acceleration of the system is: __________________ m/s2. Answer: the amount of work done by the squirrel in storing the acorns is: ____________ j. Answer: the force (f1 or f2 ) that would accomplish more work at the end of the.

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lilachorse65

a.A sinewave has a period (duration of one cycle) of 645 μs. What is the corresponding frequency of this sinewave, in kHz, expressed to 3 significant figures? (See Study Note 7.1 in the ‘Using Numbers (maths)’ booklet.)

A (i) If the frequency of the sinewave is now reduced by a factor of 3.5, what will be the new period value? Express your answer in ms, to 3 significant figures.

Note: In the second part of this question, to avoid rounding errors in your calculations, use the full frequency value from the first part, not the rounded value to 3 significant figures.