Tutoring
Extra Credit Brown Bag
Extra Credit UNM

Due 9/5: Homework Chapter 5 # 55, 61, 78, 79, 80, 83, 84, 94, 97

Answers: 55)60nC, 61)-5.11N(j-hat), 78)SQRT(2)r1, 79)-2.8uC, 80)2.0x10^16m/s^2(j-hat), 83)kQ/[a(L+a)], 84)2k(lamda)/r, 94)1.2x10^(-3)m, 97){2k(lamda)/r}[-(i-hat)-(j-hat)]

Due 9/12: Homework Chapter 6 # 30, 48, 49, 50, 52, 53, 54, 68, 75, 89

Answers: 30) 0,-2q/eo,q/eo,-4q/eo,-2q/eo,3q/eo; 48)5.65x10^5N/C; 50)1.8x10^8N/C(-r-hat),0; 52)0,4.8N/C(r-hat),0,2.1N/C(r-hat),1.0N/C(r-hat); 53)rho*r/(2eo)(r-hat),pho*R^2/(2*r*eo)(r-hat); 54)alpha*r^2/(3eo)(r-hat),alpha*R^3/(3*r*eo)(r-hat); 68)4.0x10^(-6)C/m^2,4.5x10^5N/C(i-hat); 75)Eo(pi)R^2,0; 89)0, q1/(4*pi*eo*r^2)(r-hat), (q1+q2)/(4*pi*eo*r^2)(r-hat),0,q1,-q1,q1+q2.

Due 9/19: Homework Chapter 7 # 29, 30, 52, 56, 60, 70 (plates should have opposite sign), 77, 104, 105

Answers: 29)3.4J,2.4x10^4m/s; 30)471m/s; 52)7.5x10^8V,-3.8x10^9V,-9.0x10^8V,-9.0x10^8V; 56)(y^2z-4y)(i-hat)+(2xyz-4x)(j-hat)+xy^2(k-hat); 60)0,1.4MV,-kq1(1/0.05m-1/r),1.4MV,0; 70)4.4x10^15m/s^2; 77)1.9x10^6m/s,4.2x10^6m/s,5.9x10^6m/s,7.3x10^6m/s,8.4x10^6m/s; 104)4.1x10^16rad/s; 105)(i-hat),3.56x10^(-4)m,1.42x10^(-10)s,5.00x10^6m/s(-i-hat)

Due 9/26: Homework Ch 5 #118 and 125; Ch 6 #95; Ch 7 #101; Ch 8 #37, 53, 67, 69, 77, 78 parts (a) and (b)

5-118)1.0x10^4N/C(i-hat)+1.9x10^4N/C(j-hat), 0.051N(i-hat)+0.093N(j-hat); 5-125)kq(lambda)l/[a*SQRT(a^2+x^2)](j-hat); 6-95)q/(2*A*eo)(r-hat); 7-101)-6.78x10^4C,2.6x10^(18)m/s^2(r-hat), 2.4x10^(-18)kg; 8-37)11.4x10^(-6)F; 8-53)3.0V,0.60V,1.5x10^3V/m,300V/m; 8-67)0.065F,2.26x10^5C,4.0GJ; 8-69)75.6x10^(-6)C,10.8V; 8-77)89pF,6.1KV/m,4.5KV/m; 8-78)100V,150V.

Due 10/3: Homework Chapter 9 # 24, 30, 47, 61, 86, 88, 89 (find resistance in r-hat direction and in direction of long axis), 91 (for (d) assume all electrical energy converted to heat energy), 92 (look up wire radius on wikipedia)

9-24)1.4C; 9-30)3.5A/m^2,3.7x10^7m/s,1.78x10^(-4)s; 9-47)2.4x10^(-8)ohm-m,112-ohms; 9-61)29%,4.0x10^(-5)%; 9-86)3.15x10^(-4)A; 9-88)-2.0A, -1.21A, 3.47s; 9-89)0.00251-ohms,0.20-ohms; 9-91)8.7A,2.5x10^(23)electrons,132-ohms,4.7x10^6J; 9-92)1.7A,10.5hours

Due 10/10: Homework Chapter 10 # 30, 38, 40, 50, 51 (part (a) 0.100x10(-6)seconds), 55, 72, 78, 90, 93

Answers: 10-30)0.4A,3.84W,15.36W,2.0A,0.5A,96W,24W; 10-38)3A,1A,18V; 10-40)1.5A,2.0A,0.5A; 10-50)3.3x10^7(ohms); 10-51)2.5x10^(-6)F,2.0s;10-55)10-microfarads,no; 10-78)2.0V,0.50V,1.50V; 10-90)9.99995A,1.25x10^(-3)V,1.25x10^(-4)ohms; 10-93)3800s,1.26mA,2633s.

Due 10/17:Homework Chapter 11 # 17, 34, 56, 83, 93, 104, 105, 106 (go by wording, not pic.), 108, 110

Answers:11-56)1.72x10^(-4)m; 11-83)LwIA(i-hat); 11-93)2.8x10^(-8)V; 11-104)13.8degrees; 11-105)aIL^(2)/2(-j-hat); 11-106)wIB/(2k); 11-108)pi`Ir^(2)Bosin(theta); 11-110)0.025A`m^2(-k-hat),1.5x10^(-4)m`N(i-hat)+5.0x10^(-5)m`N(-j-hat)

Due 10/24:Homework Chapter 12 # 18, 32, 34, 48, 65, 70, 81, 90, 91

Due 11/7:Homework Chapter 13 #

Due 11/14:Homework Chapter 1 #

Due 11/21:Homework Chapter 2 #

Due 11/28:Homework Chapter 3 #

Due 12/5:Homework Chapter 4 #