Physics 9 Homework

Physics 9 Homework Spring 2003
Date Knight Text Knight Workbook
02/18/03 Read Section V overview, Ch24 Sections 24.1 - 24.4
Read ONLINE pages "Sticky Tape" Lab  		-
02/20/03 Ch 24: 5, 6, 7 Ch 24: 1-4, 4-5, 6-7, 8-10,  25-27, 28, 29
02/25/03 Ch24: 10, 11a, 11b, 13, 14 Ch 24: 12, 13,14, 18 - 20, 21-24
02/27/03 Ch24: 1, 2, 3, 8, 9, 15, 16ab, 16c, 17
Read Ch25 		 Ch24: 31-32, 33-35, 36
 Ch25: 1, 2, 3, 6, 9, 10, 17, 18
03/4/03 Ch24: 12
Ch25:  1, 3, 6, 7,  8
SMART Pages: Electric Fields and Polarization 		 Ch25:  28, 29
03/6/03 Read Ch26  Ch26: 6-8, 9, 12, 13
03/13/03 SMART Pages: Currents and Bulbs 5-1 -
- SMART Pages: Currents and Bulbs 6-2 -
03/27/03 SMART Pages: Currents and Bulbs  7-1, 7-2, 7-3
Read Ch27 - skim for concepts 		 -
4/01/03 Ch27: 3, 7, 9 Ch27: 1, 2, 3, 4, 5, 8, 9, 13, 14
4/03/03 SMART Pages: Electric Potential 8-2, 4, 5
Ch28: 1-4		 Ch27: 15, 16, 17
Ch29: 4, 5
4/8/03 Ch29: 1, 3, 6 Ch29:  11, 12, 13, 14, 15
4/10/03 Ch 29: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 13, 14
Read Ch30 		Ch29: 8
Ch 30: 3, 7, 8, 12, 13, 14, 15, 16, 17, 18
SPRING BREAK
4/22/03 Ch 30: 5a, 5b-7, 10, 16, 17a, 17b
Read Ch 31.1 - 31.5		 Ch 30: 19, 20, 21, 22, 26, 27, 28, 32, 33
4/24/03 Ch 31: 1, 2, 3, 4, 6, 7 Ch 31: 1, 8, 9, 12, 13, 14, 15, 16
5/1/03  Ray Diagrams   
Answers
5/8/03 - Ch 32: 6, 11, 14, 15, 17
5/15/03 Ch 33: 1-3, 4-7 Ch 33: 1-2 , 3-6, 7- 8, 11, 12-15, 21-25
5/20/03 Ch 34: 1-3, 4-5, 6-7
 Read Ch 35
Ch 35: 3, 5, 7, 9, 10		 Ch 35: 4, 5, 6, 7, 8, 9, 10
5/22/03 Ch33: 10, 13, 15; 
Ch 35: 3, 5, 7, 9, 10 		Ch 35: 4, 5, 6, 7, 8, 9, 10
5/29/03

1. How fast must a meter stick be moving if its length is observed to shrink to 0.500m? (0.866 c)

2. An astronaut is traveling in space at a speed of 0.50 c relative to the earth. The astronaut measures her pulse rate to be 75 per minute. What is the pulse rate as observed on earth? If her speed was 0.990 c? (64.9, 10.6)


3. The proper length of spaceship 1 is 3 times longer than spaceship 2. They are traveling in the same direction past an observer. The observer sees the ships having the SAME length. If the slower ship’s speed is 0.350 c, what is the other’s?

4. A spaceship of proper length Lp = 300 m takes 7.5 x 10-7 s to pass a stationary observer (time measured by the observer). What is the speed of the ship as measured by the observer? (0.800 c)

5. Two space ships A and B move TOWARD each other (Draw a picture and be careful of the signs of velocities). An observer at rest sees them with speeds of vA = 0.75 c and vB = 0.85 c. What speed does B have with respect to A? (Hint: make the moving frame be A and so the speed of B relative to rest (u) is known. Then solve for u’.) (u’ = -0.98 c)

 

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