Phys 221 Homework
Spring 2012
|
Assignment |
Even Answers |
Due |
1/11/12 |
|||
Watch
Khan Intro to A, T, f, l Ch. 13 CQ 9, Problems 41, 43, 45, 46, 51, 52 (m is mass/length Ch 14 CQ 2, 6, Describe in detail the
difference between resonance and sympathetic/forced vibration. For a piano
what is the source of vibration, how pitch is changed and what amplifies the
sound? |
46. 5.7 mm 52.a) eq1: time eq 2: mass x
length/time2 b) 1: period 2: force |
1/17/12 |
|
Watch Khan Mach Numbers |
1/18/12 |
||
HW #2 |
Khan “graphs of sin and cosine” problems. Print sheet showing your status bar full from blue all the way to bright red. Ch 14 CQ 3, 8, 11 Problems 1, 4, 6, 10, 13, 17, 24, 26, 27, 29, 62 |
4. 0.196 s 6. 17.3m, 0.0173m 10. 1000 w/m2 24. a. 10,000 Hz b. 3333 Hz 26. behind 31.8 m/s 62. 1000 (1024 ok also) |
1/24/12 |
1/27/12 |
|||
Ch 13 problem 42 (for part c find the frequency not the angular frequency), additional problems. Notice that 64 b. asks for wave speed not particle speed. |
42. d. v = .031 m/s, e. a=
.049 m/s2 f. x = 0.02m sin (0.5p t) Addt Prob: 1. a. 0.015m, b. 1/6s, c.
6hz, e. v = 0.57 m/s cos (12p t), a = -21 m/s2 sin (12p t) f. 0.57 m/s 64. a. 15 cm b. 0.15 m/s |
1/31/12 |
|
HW #4 |
Ch 13 CQ 4, 7 Problems 1, 3, 4 (c. what is the slope of the graph in b.?), 9, 15, 19, 21, 27, 35, 37, 39 |
4. a. 110 N, c. 1000 N/m |
2/3/12 |
Read about Elephant acoustics |
|
2/6/12 |
|
2/13/12 |
|||
HW #5 |
CH 21 Problems 49, 61, 66 Ch 22 CQ 3, Problems 2, 5, 9, 19 |
66. 1.1 x 107
m/s 2. a. 1.989 x 10-15
J b. 12,400 eV |
2/17/12 |
Sign conventions for mirrors and lenses |
|||
HW #6 |
Ch 22 problems 29, 34, 35 Ch 23 CQ 1, 4, 6 Problems 3, 6, 8, 13, 14 (include ray diagrams for 13 and 14) |
34. a)43.3o b)
42.2o, c) 40.4o 6. a) 2.22 cm, b) 10.0 8. -0.790 cm 14. a) 60cm b) q = 42.9 cm,
M = -0.429 real, inverted, 42.9 cm in front of mirror c) q = -15.0 cm, M =
1.50, virtual, upright, 15.0 cm behind mirror T. rex:
q =-10/11m, h’ = 5/11m |
2/24/12 |
HW #7 |
Ch 23 CQ 11, 12, 13 problems 29, 31, 33 (include ray diagrams for 31, 33) Ch 25 CQ 7, 11, 14 problems 9, 11 |
3/2/12 |
|
HW #8 |
3/9/12 |
||
HW #9 |
Ch 15 CQ 2,4,6,13 problems 11, 30 additional problems |
3/23/12 |
|
HW #10 |
Ch 16 CQ 1, 4, 7, 10, 14 Problems 3, 7, 13, 23, 25 additional problems |
3/28/12 |
|
HW #11 |
Ch 17 CQ 1, 6, 7 Problems 1, 11, 20, 23, 34, 42, 50, 54 |
20. 5 x 105V 34.a. $0.29, b. $2.60 42. a. 0.66 kWh, b. $0.079 50. 15.0 h, 54. 90 mV |
3/30/12 |
HW #12 |
Ch 18 CQ 2(you can use 1, 2, or 3 bulbs at a time – assume the bulbs are identical.), 8, 10 Problems 2, 5, 7, 9, 14, 22, 31, 34, 37, 38 |
CQ2. 7 possibilities 2. a. 27W, b.0.44A, c. 3.0W, 1.3A 14. Yes, Req = 8.00W, b. 2.25A, c. 40.5W 22. a.
60.0 W
, b. 0.20A, c. 2.4W, d.0.50W, 34. 1.3 x 102
mC, 38. 8.0 A,
120 V, 0.80 A, 5.8 x 102 W |
4/10/12 |
HW #13 |
Ch 19 CQ 2, 4, 5, 6, 8, 13, 17 Problems 4, 10, 11, 13, 17, 43, 44, 45 |
4. top,
out, zero, in 10. 807N, 44. Left, out,
left to right |
4/17/12 |
HW #14 |
Ch 27 CQ 2, 8, 9, 16 Problems 9, 10, 12, 27, 28, 30 Ch 28 CQ 2, 8, 10, 15, Problems 10 (hint: find part c first), 13, 14 Ch 29 CQ 1, 3, 6, 8, 13 Ch 30 CQ 2, 4 |
Ch 27 10. a. 288nm, b. 1.04
x 1015 Hz, c. 1.19 eV 12. A. only
lithium, b. 0.81 eV 28. A. 1.99 10-11
m, b. 1.98 x 10-14 m Ch 28 10. a.
1.281 x 10-6 m, b. 2.34 x 1014 Hz, 0.970 eV 14. A. 12.1 eV, b. 12.1 eV, 1.89 eV, 10.2 eV |
4/24/12 |