initial commit / add all books

60 files changed, 471 insertions, 0 deletions

diff --git a/3875/CH10/EX10.1/10_1.txt b/3875/CH10/EX10.1/10_1.txt
new file mode 100644
index 000000000..f497efb24
--- /dev/null
+++ b/3875/CH10/EX10.1/10_1.txt
@@ -0,0 +1 @@
+ The temperature of the star is = 68511 K
\ No newline at end of file
diff --git a/3875/CH10/EX10.1/Ex10_1.sce b/3875/CH10/EX10.1/Ex10_1.sce
new file mode 100644
index 000000000..43ead0301
--- /dev/null
+++ b/3875/CH10/EX10.1/Ex10_1.sce
@@ -0,0 +1,10 @@
+clc;

+clear;

+T1=6000 //temperature of the sun in K

+E1_by_E2=17000 //ratio of luminosity of sun to the star 

+

+//calculation

+

+T2=T1*E1_by_E2^(1/4)

+mprintf("The temperature of the star is = %d K",T2)

+//Answer varies due to round off error

diff --git a/3875/CH10/EX10.10/10_10.txt b/3875/CH10/EX10.10/10_10.txt
new file mode 100644
index 000000000..2d33fc577
--- /dev/null
+++ b/3875/CH10/EX10.10/10_10.txt
@@ -0,0 +1 @@
+Since the threshold wavelength is 5.405e-07,wavelength 680nm is not capable of showing photoelectric effect as threshold wavelength is the longest wavelength
\ No newline at end of file
diff --git a/3875/CH10/EX10.10/Ex10_10.sce b/3875/CH10/EX10.10/Ex10_10.sce
new file mode 100644
index 000000000..58cf3312d
--- /dev/null
+++ b/3875/CH10/EX10.10/Ex10_10.sce
@@ -0,0 +1,10 @@
+clc;

+clear;

+W=2.3*1.6*10^-19 //Energy required to remove electron in eV

+h=6.63*10^-34 //Plancks constant in J-s

+c=3*10^8 //velocity of light in m/s

+

+//calculation

+lambda_0=(h*c)/W

+printf("\nSince the threshold wavelength is %1.3e,wavelength 680nm is not capable of showing photoelectric effect as threshold wavelength is the longest wavelength",lambda_0)

+//The answer provided in the textbook is wrong.

diff --git a/3875/CH10/EX10.11/10_11.sce b/3875/CH10/EX10.11/10_11.sce
new file mode 100644
index 000000000..d9c1fae87
--- /dev/null
+++ b/3875/CH10/EX10.11/10_11.sce
@@ -0,0 +1,11 @@
+clc;

+clear;

+W=1.2*1.6*10^-19 //work function in eV

+h=6.6*10^-34 //Plancks constant in J-s

+v=5.5*10^14 // frequency of light in Hz

+e=1.6*10^-19 //charge in C

+

+V_s=((h*v)-W)/e

+

+mprintf("The stopping potential is = %1.2f volt",V_s)

+//Answer varies due to round off error.

diff --git a/3875/CH10/EX10.11/10_11.txt b/3875/CH10/EX10.11/10_11.txt
new file mode 100644
index 000000000..4c8f076bc
--- /dev/null
+++ b/3875/CH10/EX10.11/10_11.txt
@@ -0,0 +1 @@
+ The stopping potential is = 1.07 volt
\ No newline at end of file
diff --git a/3875/CH10/EX10.12/10_12.sce b/3875/CH10/EX10.12/10_12.sce
new file mode 100644
index 000000000..9f67c5503
--- /dev/null
+++ b/3875/CH10/EX10.12/10_12.sce
@@ -0,0 +1,10 @@
+clc;

+clear;

+h=6.63*10^-34 //Plancks constant in J-s

+v0=6*10^14 // threshold frequency of light in Hz

+e=1.6*10^-19 //charge in C

+V_s=3 //stopping potential in V

+

+//calculation

+v=((e*V_s)/h)+v0

+mprintf("The frequency of light which ejects electrons from the surface is %1.3e Hz",v)

diff --git a/3875/CH10/EX10.12/10_12.txt b/3875/CH10/EX10.12/10_12.txt
new file mode 100644
index 000000000..a397a75bc
--- /dev/null
+++ b/3875/CH10/EX10.12/10_12.txt
@@ -0,0 +1 @@
+ The frequency of light which ejects electrons from the surface is 1.324e+15 Hz
\ No newline at end of file
diff --git a/3875/CH10/EX10.13/10_13.sce b/3875/CH10/EX10.13/10_13.sce
new file mode 100644
index 000000000..366e8ace0
--- /dev/null
+++ b/3875/CH10/EX10.13/10_13.sce
@@ -0,0 +1,26 @@
+clc;

+clear;

+h=6.63*10^-34 //Plancks constant in J-s

+v=3*10^8 // frequency of light in Hz

+e=1.6*10^-19 //charge in C

+lambda=200*10^-9 //wavelength in m

+W=4.2 //work function in Joule

+c=3*10^8 //velocity of light in m/s

+

+//calculation 

+E=(h*v)/(lambda)//energy in J

+E_v=E/e //energy in eV

+

+//case (1)

+E_k=E_v-W

+mprintf("\nThe kinetic energy of the fastest electrons is = %d eV\n",E_k)

+

+//case(2)

+mprintf("\nThe kinetic energy of slowest electrons is zero.As the emitted electrons have all possible energies from 0 to certain maximun value is E_k\n")

+

+//case(3)

+mprintf("If V_s is the stopping potential then E_k=e*V_s.Since the electrons have a maximum kinetoc energy of 2eV,the stopping potential is 2V.\n")

+

+//case(4)

+lambda_0=(h*c)/(W*e)

+mprintf("The cut off wavelength for aluminium is %1.2e m",lambda_0) //The answer provided in the textbook is wrong.

diff --git a/3875/CH10/EX10.13/10_13.txt b/3875/CH10/EX10.13/10_13.txt
new file mode 100644
index 000000000..03b02fccb
--- /dev/null
+++ b/3875/CH10/EX10.13/10_13.txt
@@ -0,0 +1,4 @@
+The kinetic energy of the fastest electrons is = 2 eV

+The kinetic energy of slowest electrons is zero.As the emitted electrons have all possible energies from 0 to certain maximun value is E_k

+If V_s is the stopping potential then E_k=e*V_s.Since the electrons have a maximum kinetoc energy of 2eV,the stopping potential is 2V.

+The cut off wavelength for aluminium is 2.96e-07 m
\ No newline at end of file
diff --git a/3875/CH10/EX10.14/10_14.sce b/3875/CH10/EX10.14/10_14.sce
new file mode 100644
index 000000000..08ed781f7
--- /dev/null
+++ b/3875/CH10/EX10.14/10_14.sce
@@ -0,0 +1,17 @@
+clc;

+clear;

+P=10^-3 //power in watt

+h=6.62*10^-34 //Plancks constant in J-s

+v=3*10^8 //frequncy of light in Hz

+lambda=4560*10^-10 //wavelength in m

+eff=0.005 //quantum efficiency

+e=1.6*10^-19 //charge in C

+

+//calculation

+E=(h*v)/lambda //energy of each photon in joules

+N=P/E //no of photons incident on the metal per sec

+N_e=N*eff //no of electrons released per sec

+I=N_e*e

+

+mprintf("The photoelectric current is = %1.3e amp or 1.837 micro-amp",I)

+//The Answer provided in the textbook is wrong.

diff --git a/3875/CH10/EX10.14/10_14.txt b/3875/CH10/EX10.14/10_14.txt
new file mode 100644
index 000000000..2222cadcd
--- /dev/null
+++ b/3875/CH10/EX10.14/10_14.txt
@@ -0,0 +1 @@
+ The photoelectric current is = 1.837e-06 amp or 1.837 micro-amp
\ No newline at end of file
diff --git a/3875/CH10/EX10.15/10_15.sce b/3875/CH10/EX10.15/10_15.sce
new file mode 100644
index 000000000..e871bae41
--- /dev/null
+++ b/3875/CH10/EX10.15/10_15.sce
@@ -0,0 +1,14 @@
+clc;

+clear;

+lambda1=400 //wavelength in nm

+lambda2=300 //wavelength in nm

+V1=0.82 //stopping potential in V

+V2=1.85 //stopping potential in V

+c=3*10^8 //velocity of light in m/s

+e=1.6*10^-19 //charge in C

+

+//calculation

+h=(e*(V1-V2)*(lambda1*10^-9)*(lambda2*10^-9))/(c*(lambda2-lambda1)*10^-9)

+

+mprintf("\nThe Plancks constant is = %1.3e J-s\n",h)

+mprintf("The photoelectric current will not be obtained as the stopping potential does not depend on the intensity of light")

diff --git a/3875/CH10/EX10.15/10_15.txt b/3875/CH10/EX10.15/10_15.txt
new file mode 100644
index 000000000..6ceeab3ff
--- /dev/null
+++ b/3875/CH10/EX10.15/10_15.txt
@@ -0,0 +1,2 @@
+The Plancks constant is = 6.592e-34 J-s

+The photoelectric current will not be obtained as the stopping potential does not depend on the intensity of light
\ No newline at end of file
diff --git a/3875/CH10/EX10.16/10_16.sce b/3875/CH10/EX10.16/10_16.sce
new file mode 100644
index 000000000..08cbd5717
--- /dev/null
+++ b/3875/CH10/EX10.16/10_16.sce
@@ -0,0 +1,16 @@
+clc;

+clear;

+h=6.63*10^-34 //plancks constant in J-s

+c=3*10^8 //velocity of light in m/s

+lambda=180*10^-9 //wavelength in m 

+W=2*1.6*10^-19 //work function in Joule

+m=9.1*10^-31 //mass in kg

+e=1.6*10^-19 //charge in C

+B=5*10^-5 //magnetic flux density in Tesla

+

+//calculation

+E=((h*c)/lambda)-W //kinetic energy in J

+v=sqrt((2*E)/m) //velocity in m/s

+r=(m*v)/(e*B)

+

+mprintf("The radius of the circular path in magnetic field is = %1.3f m",r)

diff --git a/3875/CH10/EX10.16/10_16.txt b/3875/CH10/EX10.16/10_16.txt
new file mode 100644
index 000000000..25323313a
--- /dev/null
+++ b/3875/CH10/EX10.16/10_16.txt
@@ -0,0 +1 @@
+ The radius of the circular path in magnetic field is = 0.149 m
\ No newline at end of file
diff --git a/3875/CH10/EX10.17/10_17.sce b/3875/CH10/EX10.17/10_17.sce
new file mode 100644
index 000000000..b97570e6e
--- /dev/null
+++ b/3875/CH10/EX10.17/10_17.sce
@@ -0,0 +1,20 @@
+clc;

+clear;

+h=6.63*10^-34 //Plancks constant in J-s

+c=3*10^8 //velocity of light in m/s

+E0=6.20*10^3 //energy of photon in keV

+freq_s=0.5/100 //frequency shift

+m=9.1*10^-31 //mass in kg

+

+

+

+//CALCULATION

+lambda0=(h*c)/(E0*1.6*10^-19) //wavelength in m

+delta_E=(freq_s*E0)/10^3 //Loss in energy of photon in keV

+E=(E0/10^3)-delta_E //energy of scattered photon on keV

+lambda=(h*c)/(E*10^3*1.6*10^-19) //wavelength of scattered photon in m

+delta_lambda=lambda-lambda0 //compton shift

+phi=acosd(1-(m*c*delta_lambda)/h)

+

+mprintf("The angle through which Xray is scattered is = %2.1f degree",phi)

+//The answer varies due to round off error.

diff --git a/3875/CH10/EX10.17/10_17.txt b/3875/CH10/EX10.17/10_17.txt
new file mode 100644
index 000000000..97102ac45
--- /dev/null
+++ b/3875/CH10/EX10.17/10_17.txt
@@ -0,0 +1 @@
+ The angle through which Xray is scattered is = 54.2 degree
\ No newline at end of file
diff --git a/3875/CH10/EX10.18/10_18.sce b/3875/CH10/EX10.18/10_18.sce
new file mode 100644
index 000000000..b0de5c216
--- /dev/null
+++ b/3875/CH10/EX10.18/10_18.sce
@@ -0,0 +1,17 @@
+clc;

+clear;

+h=6.63*10^-34 //Plancks constant in J-s

+c=3*10^8 //velocity of light in m/s

+m=9.1*10^-31 //mass in kg

+lambda_1=100*10^-12 //wavelength in m

+e=1.6*10^-19 //charge in C

+

+

+//calculation

+delta_lambda=(h/(m*c)) //wavelength in m

+mprintf("The compton shift is = %1.2e m\n",delta_lambda)

+

+lambda_0=lambda_1-delta_lambda //wavelength of the scattered photon in m 

+delta_E=(h*c*delta_lambda)/(lambda_1*lambda_0)

+mprintf("\nThe kinetic energy imparted to the electron is = %1.2e J or %1.2f eV",delta_E,delta_E/e)

+//The answer provided in the textbook is wrong.

diff --git a/3875/CH10/EX10.18/10_18.txt b/3875/CH10/EX10.18/10_18.txt
new file mode 100644
index 000000000..c3d75e176
--- /dev/null
+++ b/3875/CH10/EX10.18/10_18.txt
@@ -0,0 +1,3 @@
+The compton shift is = 2.43e-12 m

+

+The kinetic energy imparted to the electron is = 4.95e-17 J or 309.42 eV
\ No newline at end of file
diff --git a/3875/CH10/EX10.2/10_2.txt b/3875/CH10/EX10.2/10_2.txt
new file mode 100644
index 000000000..0dea02611
--- /dev/null
+++ b/3875/CH10/EX10.2/10_2.txt
@@ -0,0 +1 @@
+ The energy radiated per unit area per sec is = 2325 Joules.
\ No newline at end of file
diff --git a/3875/CH10/EX10.2/Ex10_2.sce b/3875/CH10/EX10.2/Ex10_2.sce
new file mode 100644
index 000000000..4ce6773f5
--- /dev/null
+++ b/3875/CH10/EX10.2/Ex10_2.sce
@@ -0,0 +1,12 @@
+clc;

+clear;

+e=0.85 //emissivity

+T=2000 //Temperature in K

+A=5*10^-5 //surface area in m^2

+t=60 //time in s 

+sigma=5.7*10^-8 //Stefan-Boltzmann Constant in J/m^2sK^4

+

+//calculation

+Q=e*sigma*T^4*A*t

+mprintf("The energy radiated per unit area per sec is = %d Joules.",Q)

+//The answer varies due to round off error.

diff --git a/3875/CH10/EX10.20/10_20.sce b/3875/CH10/EX10.20/10_20.sce
new file mode 100644
index 000000000..11386d3a2
--- /dev/null
+++ b/3875/CH10/EX10.20/10_20.sce
@@ -0,0 +1,13 @@
+clc;

+clear;

+E0=100 //energy of the incident photon in keV

+E=90 //energy of the scattered photon in keV

+m=9.1*10^-31 //mass in kg

+c=3*10^8 //velocity of light in m/s

+

+//calculation

+delta_E=E0-E //energy lost in keV

+mc_square=(m*c^2)/(1.6*10^-19*10^3) //calculating one part of the formula

+phi=acosd(1-(delta_E/E*mc_square/E0))

+

+mprintf("The scattering angle of the photon is = %2.1f degree",phi)

diff --git a/3875/CH10/EX10.20/10_20.txt b/3875/CH10/EX10.20/10_20.txt
new file mode 100644
index 000000000..8ade5cdab
--- /dev/null
+++ b/3875/CH10/EX10.20/10_20.txt
@@ -0,0 +1 @@
+ The scattering angle of the photon is = 64.5 degree
\ No newline at end of file
diff --git a/3875/CH10/EX10.21/10_21.sce b/3875/CH10/EX10.21/10_21.sce
new file mode 100644
index 000000000..b6e649f42
--- /dev/null
+++ b/3875/CH10/EX10.21/10_21.sce
@@ -0,0 +1,24 @@
+clc;

+clear;

+KE=10*1.6*10^-19 //energy in J

+m=9.1*10^-31 //mass in kg

+h=6.63*10^-34 //Plancks constant in J-s

+m_h=2*10^-3 //molecular weight of hydrogen in kg

+a=6.023*10^23 //Avogadros constant in mol^-1

+v=2200 //velocity in m/s

+m_g=45*10^-3 //mass of golf ball in kg]

+v_g=22 //velocity of golf ball in m/s

+

+//calculation

+//case (a)

+lambda=(h/sqrt(2*m*KE))

+mprintf("The de-Broglie wavelength is = %1.3e m or 0.388 nm\n",lambda)

+

+//case (b)

+m=m_h/a //mass in kg

+lambda=(h/(m*v))

+mprintf("The de-Broglie wavelength is = %1.2e m or 0.988 nm\n",lambda) //The answer provided in the textbook is wrong.

+

+//case (c)

+lambda1=h/(m_g*v_g)

+mprintf("The de-Broglie wavelength of the golf ball is = %1.1e m",lambda1)

diff --git a/3875/CH10/EX10.21/10_21.txt b/3875/CH10/EX10.21/10_21.txt
new file mode 100644
index 000000000..82826abd1
--- /dev/null
+++ b/3875/CH10/EX10.21/10_21.txt
@@ -0,0 +1,3 @@
+The de-Broglie wavelength is = 3.885e-10 m or 0.388 nm

+The de-Broglie wavelength is = 9.08e-11 m or 0.988 nm

+The de-Broglie wavelength of the golf ball is = 6.7e-34 m
\ No newline at end of file
diff --git a/3875/CH10/EX10.22/10_22.sce b/3875/CH10/EX10.22/10_22.sce
new file mode 100644
index 000000000..6589f86c5
--- /dev/null
+++ b/3875/CH10/EX10.22/10_22.sce
@@ -0,0 +1,11 @@
+clc;

+clear;

+h=6.63*10^-34 //Plancks constant in J-s

+K_b=1.38*10^-23 //Boltzmanns constant in  m^2 kg s^-2 K^-1

+T=300 //Temperature in K

+m=1.00878*1.66*10^-27 //mass of neutron in kg

+

+//calculation

+lambda=(h/sqrt(3*m*K_b*T))

+

+mprintf("The de-Broglie wavelength is = %1.2e m or 0.145 nm",lambda)

diff --git a/3875/CH10/EX10.22/10_22.txt b/3875/CH10/EX10.22/10_22.txt
new file mode 100644
index 000000000..5f1b842cd
--- /dev/null
+++ b/3875/CH10/EX10.22/10_22.txt
@@ -0,0 +1 @@
+ The de-Broglie wavelength is = 1.45e-10 m or 0.145 nm
\ No newline at end of file
diff --git a/3875/CH10/EX10.23/10_23.sce b/3875/CH10/EX10.23/10_23.sce
new file mode 100644
index 000000000..fa3ea5de4
--- /dev/null
+++ b/3875/CH10/EX10.23/10_23.sce
@@ -0,0 +1,12 @@
+clc;

+clear;

+m=9.1*10^-31 //mass in kg

+h=6.63*10^-34 //Plancks constant in J-s

+e=1.6*10^-19 //charge in C

+lambda=0.1 //wavelength in nm

+

+//calculation

+V=(((h/(sqrt(2*m*e)))*10^9)/(lambda))^2 //multipyling by 10^9 to convert from m to nm according to textbook convention.

+

+mprintf("The voltage to which electron can be accelerated is = %.4e volts or 150.95 volts",V)

+//The answer varies due to round off error.

diff --git a/3875/CH10/EX10.23/10_23.txt b/3875/CH10/EX10.23/10_23.txt
new file mode 100644
index 000000000..e51e662db
--- /dev/null
+++ b/3875/CH10/EX10.23/10_23.txt
@@ -0,0 +1 @@
+The voltage to which electron can be accelerated is = 1.5095e+02 volts or 150.95 volts
\ No newline at end of file
diff --git a/3875/CH10/EX10.24/10_24.sce b/3875/CH10/EX10.24/10_24.sce
new file mode 100644
index 000000000..2334824a0
--- /dev/null
+++ b/3875/CH10/EX10.24/10_24.sce
@@ -0,0 +1,16 @@
+clc;

+clear;

+KE=0.04*1.6*10^-19 //energy in J

+m=1.675*10^-27 //mass of neutron in kg

+h=6.63*10^-34 //Plancks constant in J-s

+c=3*10^8 //velocity of light in m/s

+

+//calculation

+lambda=(h/sqrt(2*m*KE))/10^-9

+mprintf("The de-Broglie wavelength is = %1.3f nm\n",lambda)

+v_g=h/(lambda*10^-9*m)

+mprintf("The group velocity is = %1.2e m/s\n",v_g)

+v_p=(c^2)/v_g

+mprintf("The phase velocity is = %1.2e m/s\n",v_p)

+E=(h*c)/(lambda*10^-9)

+mprintf("The energy of the nuetron is = %1.2e J or 8.69 keV",E)

diff --git a/3875/CH10/EX10.24/10_24.txt b/3875/CH10/EX10.24/10_24.txt
new file mode 100644
index 000000000..5361a03ed
--- /dev/null
+++ b/3875/CH10/EX10.24/10_24.txt
@@ -0,0 +1,4 @@
+ The de-Broglie wavelength is = 0.143 nm

+The group velocity is = 2.76e+03 m/s

+The phase velocity is = 3.26e+13 m/s

+The energy of the nuetron is = 1.39e-15 J or 8.69 keV
\ No newline at end of file
diff --git a/3875/CH10/EX10.25/10_25.sce b/3875/CH10/EX10.25/10_25.sce
new file mode 100644
index 000000000..9f266713a
--- /dev/null
+++ b/3875/CH10/EX10.25/10_25.sce
@@ -0,0 +1,9 @@
+clc;

+clear;

+g=9.8 //acceleration  due to gravity in m/s^2

+lambda=10 //wavelength in m

+

+//calculation

+

+v_g=sqrt((lambda*g*%pi)/2)

+mprintf("The group velocity is = %2.2f m/s",v_g)

diff --git a/3875/CH10/EX10.25/10_25.txt b/3875/CH10/EX10.25/10_25.txt
new file mode 100644
index 000000000..6d754462a
--- /dev/null
+++ b/3875/CH10/EX10.25/10_25.txt
@@ -0,0 +1 @@
+The group velocity is = 12.41 m/s
\ No newline at end of file
diff --git a/3875/CH10/EX10.26/10_26.sce b/3875/CH10/EX10.26/10_26.sce
new file mode 100644
index 000000000..0d27dca62
--- /dev/null
+++ b/3875/CH10/EX10.26/10_26.sce
@@ -0,0 +1,12 @@
+clc;

+clear;

+m=9.1*10^-31 //mass in kg

+h=6.63*10^-34 //Plancks constant in J-s

+e=1.6*10^-19 //charge in C

+n=1 //first reflection maximum

+tetha=60 //glancing angle

+V=344 //voltage in V

+

+//calculation

+d=((n*h)/(2*sind(60)*sqrt(2*m*e*V)))/10^-9

+mprintf("The interplanar distance is = %1.3f nm",d)

diff --git a/3875/CH10/EX10.26/10_26.txt b/3875/CH10/EX10.26/10_26.txt
new file mode 100644
index 000000000..69dd010f6
--- /dev/null
+++ b/3875/CH10/EX10.26/10_26.txt
@@ -0,0 +1 @@
+The interplanar distance is = 0.038 nm
\ No newline at end of file
diff --git a/3875/CH10/EX10.27/10_27.sce b/3875/CH10/EX10.27/10_27.sce
new file mode 100644
index 000000000..1cf63f982
--- /dev/null
+++ b/3875/CH10/EX10.27/10_27.sce
@@ -0,0 +1,14 @@
+clc;

+clear;

+m=1.675*10^-27//mass of neutron in kg

+h=6.63*10^-34 //Plancks constant in J-s

+n=1 //first reflection maximum

+KE=0.04*1.6*10^-19 //energy in J

+d=0.314*10^-9 //interplanar distance in m

+

+//calculation

+

+phi=asind((n*h)/(2*d*sqrt(2*m*KE)))

+mprintf("The glancing angle is = %2.1f degree",phi)

+//The answer varies due to round off error.

+

diff --git a/3875/CH10/EX10.27/10_27.txt b/3875/CH10/EX10.27/10_27.txt
new file mode 100644
index 000000000..8e08b11c9
--- /dev/null
+++ b/3875/CH10/EX10.27/10_27.txt
@@ -0,0 +1 @@
+The glancing angle is = 13.2 degree
\ No newline at end of file
diff --git a/3875/CH10/EX10.28/10_28.sce b/3875/CH10/EX10.28/10_28.sce
new file mode 100644
index 000000000..6c6ac371e
--- /dev/null
+++ b/3875/CH10/EX10.28/10_28.sce
@@ -0,0 +1,11 @@
+clc;

+clear;

+tetha=55 //braggs angle in degree

+KE=0.25*1.6*10^-19 //enrgy in J

+m=1.675*10^-27//mass of neutron in kg

+h=6.63*10^-34 //Plancks constant in J-s

+n=1 //first reflection maximum

+

+//calculation

+d=((n*h)/(2*sind(tetha)*sqrt(2*m*KE)))

+mprintf("The interplanar distance is = %1.1e m",d)

diff --git a/3875/CH10/EX10.28/10_28.txt b/3875/CH10/EX10.28/10_28.txt
new file mode 100644
index 000000000..4413ec68c
--- /dev/null
+++ b/3875/CH10/EX10.28/10_28.txt
@@ -0,0 +1 @@
+The interplanar distance is = 3.5e-11 m
\ No newline at end of file
diff --git a/3875/CH10/EX10.29/10_29.sce b/3875/CH10/EX10.29/10_29.sce
new file mode 100644
index 000000000..9aefd005c
--- /dev/null
+++ b/3875/CH10/EX10.29/10_29.sce
@@ -0,0 +1,13 @@
+clc;

+clear;

+m=9.1*10^-31 //mass of electron in kg

+v=4*10^5 //velocity in m/s

+u=10^-4 //uncertainity in momenmtum

+h=6.63*10^-34 //plancks constant in J-s

+

+

+//calculation

+delta_p=u*m*v //in kg-m/s

+delta_x=(h/(2*%pi*delta_p))

+mprintf("The uncertainity in the position of the electron is %1.4e m",delta_x)

+//The answer provided in the textbook is wrong.

diff --git a/3875/CH10/EX10.29/10_29.txt b/3875/CH10/EX10.29/10_29.txt
new file mode 100644
index 000000000..2d2217607
--- /dev/null
+++ b/3875/CH10/EX10.29/10_29.txt
@@ -0,0 +1 @@
+ The uncertainity in the position of the electron is 2.8989e-06 m
\ No newline at end of file
diff --git a/3875/CH10/EX10.3/10_3.txt b/3875/CH10/EX10.3/10_3.txt
new file mode 100644
index 000000000..0dc4a44f3
--- /dev/null
+++ b/3875/CH10/EX10.3/10_3.txt
@@ -0,0 +1 @@
+ The work function of the metal is = 2.25 eV
\ No newline at end of file
diff --git a/3875/CH10/EX10.3/Ex10_3.sce b/3875/CH10/EX10.3/Ex10_3.sce
new file mode 100644
index 000000000..334e10b9d
--- /dev/null
+++ b/3875/CH10/EX10.3/Ex10_3.sce
@@ -0,0 +1,18 @@
+clc;

+clear;

+h=4.136*10^-15 //Plancks constant in eV

+c=3*10^8 //velocity of light in m/s

+R=1.097*10^7 //Rydberg constant m^-1

+lambda1= 900 //wavelength in nm

+T1_by_T2=1/3   //Ratio of temperature T1 to T2

+n1=2 //energy level of atom

+n2=3 //energy level of atom

+

+//calculation

+

+lambda2=(lambda1*T1_by_T2)//wavelength in nm

+E=(h*c)/(lambda2*10^-9) //Energy of incident photon in eV

+Ex=R*h*c*((1/n1^2)-(1/n2^2)) //Excitation energy in eV

+W=E-Ex 

+

+mprintf("The work function of the metal is = %1.2f eV",W)

diff --git a/3875/CH10/EX10.31/10_31.sce b/3875/CH10/EX10.31/10_31.sce
new file mode 100644
index 000000000..cfeff01cb
--- /dev/null
+++ b/3875/CH10/EX10.31/10_31.sce
@@ -0,0 +1,11 @@
+clc;

+clear;

+delta_x=5*10^-14 //diameter of nucleus in m

+h=6.63*10^-34 //plancks constant

+m=1.675*10^-27 //mass in kg

+

+//calculation

+p_min=h/(4*%pi*delta_x) //minimum momentum in kg-m/s

+E_min=((p_min)^2/(2*m))

+

+mprintf("The minimum kinetic energy of the nucleon is = %1.2e J or 0.33*10^-15 J",E_min)

diff --git a/3875/CH10/EX10.31/10_31.txt b/3875/CH10/EX10.31/10_31.txt
new file mode 100644
index 000000000..ecefdf467
--- /dev/null
+++ b/3875/CH10/EX10.31/10_31.txt
@@ -0,0 +1 @@
+The minimum kinetic energy of the nucleon is = 3.32e-16 J or 0.33*10^-15 J
\ No newline at end of file
diff --git a/3875/CH10/EX10.32/10_32.sce b/3875/CH10/EX10.32/10_32.sce
new file mode 100644
index 000000000..cb08520f0
--- /dev/null
+++ b/3875/CH10/EX10.32/10_32.sce
@@ -0,0 +1,12 @@
+clc;

+clear;

+h=6.63*10^-34 //Plancks constant in J-s

+c=3*10^8 //velocity of light in m/s

+lambda=694.5*10^-9 //wavelength in m

+delta_t=10^-3

+

+//calculation

+delta_lambda=abs(-(lambda^2/(4*%pi*c*delta_t)))

+

+mprintf("The natural line width of laser transition is = %1.2e m",delta_lambda)

+//The answer provided in the textbook is wrong.

diff --git a/3875/CH10/EX10.32/10_32.txt b/3875/CH10/EX10.32/10_32.txt
new file mode 100644
index 000000000..59278a8e9
--- /dev/null
+++ b/3875/CH10/EX10.32/10_32.txt
@@ -0,0 +1 @@
+ The natural line width of laser transition is = 1.28e-19 m
\ No newline at end of file
diff --git a/3875/CH10/EX10.4/10_4.txt b/3875/CH10/EX10.4/10_4.txt
new file mode 100644
index 000000000..f323422fc
--- /dev/null
+++ b/3875/CH10/EX10.4/10_4.txt
@@ -0,0 +1 @@
+ The surface temperature of the sun = 5795 K
\ No newline at end of file
diff --git a/3875/CH10/EX10.4/Ex10_4.sce b/3875/CH10/EX10.4/Ex10_4.sce
new file mode 100644
index 000000000..6dd07bc90
--- /dev/null
+++ b/3875/CH10/EX10.4/Ex10_4.sce
@@ -0,0 +1,12 @@
+clc;

+clear;

+S=1.4*10^3 //rate of suns energy striking in watt/m^2

+r=1.5*10^11 //radius of earths orbit in m

+R=7*10^8 //radius of sun in m

+sigma=5.7*10^-8 //Stefan-Boltzmann Constant in J/m^2sK^4

+

+//calculation

+T=((S*r^2)/(sigma*R^2))^(1/4)

+

+mprintf("The surface temperature of the sun = %d K",T)

+//The answer provided in the textbook is wrong.

diff --git a/3875/CH10/EX10.5/10_5.txt b/3875/CH10/EX10.5/10_5.txt
new file mode 100644
index 000000000..61d54f656
--- /dev/null
+++ b/3875/CH10/EX10.5/10_5.txt
@@ -0,0 +1 @@
+ The ratio of how much body cools in the first case to the second case is = 11.3
\ No newline at end of file
diff --git a/3875/CH10/EX10.5/Ex10_5.sce b/3875/CH10/EX10.5/Ex10_5.sce
new file mode 100644
index 000000000..cbb9b2021
--- /dev/null
+++ b/3875/CH10/EX10.5/Ex10_5.sce
@@ -0,0 +1,10 @@
+clc;

+clear;

+T0=293 //temperature of the surrounding

+T1=373 //temperature of the black body in case 1

+T2=303 //temperature of the black body in case 2

+

+//calculation

+

+E1_by_E2=(T1^4-T0^4)/(T2^4-T0^4)

+mprintf("The ratio of how much body cools in the first case to the second case is = %2.1f",E1_by_E2)

diff --git a/3875/CH10/EX10.6/10_6.txt b/3875/CH10/EX10.6/10_6.txt
new file mode 100644
index 000000000..1ee3488e5
--- /dev/null
+++ b/3875/CH10/EX10.6/10_6.txt
@@ -0,0 +1 @@
+ The emissivity of the surface area is = 0.18
\ No newline at end of file
diff --git a/3875/CH10/EX10.6/Ex10_6.sce b/3875/CH10/EX10.6/Ex10_6.sce
new file mode 100644
index 000000000..d87c8d106
--- /dev/null
+++ b/3875/CH10/EX10.6/Ex10_6.sce
@@ -0,0 +1,12 @@
+clc;

+clear;

+A=5*10^-4 //area in m^2

+sigma=5.67*10^-8 //Stefan-Boltzmann Constant in J/m^2sK^4

+t=60 //time in s

+T=727+273 //temperature in K

+Q=300 //energy in J

+

+//calculation

+

+e=Q/(sigma*T^4*t*A)

+mprintf("The emissivity of the surface area is = %1.2f",e)

diff --git a/3875/CH10/EX10.7/10_7.txt b/3875/CH10/EX10.7/10_7.txt
new file mode 100644
index 000000000..7ad1f9b2b
--- /dev/null
+++ b/3875/CH10/EX10.7/10_7.txt
@@ -0,0 +1 @@
+ The time required to cool from 1000 to 300K is = 1.27e+05 sec or 127*10^3 sec
\ No newline at end of file
diff --git a/3875/CH10/EX10.7/Ex10_7.sce b/3875/CH10/EX10.7/Ex10_7.sce
new file mode 100644
index 000000000..d8bb99a98
--- /dev/null
+++ b/3875/CH10/EX10.7/Ex10_7.sce
@@ -0,0 +1,14 @@
+clc;

+clear;

+r=5*10^-2 //outer radius of copper sphere in m

+T1=10^3//temperature in K

+T2=300 //temperature in K

+c=4*10^3 //specific heat in J/kg

+rho=9*10^3 //density of copper in kg/m^3

+sigma=5.67*10^-8 // Stefan-Boltzmann Constant in J/m^2sK^4

+

+//calculation

+t=((rho*r*c)/(9*sigma))*((1/T2^3)-(1/T1^3))

+

+mprintf("The time required to cool from 1000 to 300K is = %.2e sec or 127*10^3 sec\n",t)

+

diff --git a/3875/CH10/EX10.8/10_8.txt b/3875/CH10/EX10.8/10_8.txt
new file mode 100644
index 000000000..2088ae97d
--- /dev/null
+++ b/3875/CH10/EX10.8/10_8.txt
@@ -0,0 +1 @@
+ The current in the wire is 36 amp.
\ No newline at end of file
diff --git a/3875/CH10/EX10.8/Ex10_8.sce b/3875/CH10/EX10.8/Ex10_8.sce
new file mode 100644
index 000000000..867d65020
--- /dev/null
+++ b/3875/CH10/EX10.8/Ex10_8.sce
@@ -0,0 +1,17 @@
+clc;

+clear;

+rad=10^-3 //radius of wire in m

+l=1 //length of the wire in m

+T=900 //temperature of the body in K

+T0=300 //temperature of the surrounding in K

+sigma=5.68*10^-8 // Stefan-Boltzmann Constant in J/m^2sK^4

+alpha=7.8*10^-3 //temperature coefficient of resistance 

+delta_T=600 //difference in temperature of the body and surrounding in K

+rho_300=%pi^2*10^-8 //resistivity in ohm-m 

+

+//calculation

+E=sigma*(T^4-T0^4)*2*%pi*rad*l //in watt

+rho_900=((1+alpha*delta_T)*rho_300)// resistivity in ohm-m

+R_900=rho_900*(l/(%pi*rad^2)) //resistance in ohm

+I=sqrt(E/R_900)

+mprintf("The current in the wire is %d amp.",I)

diff --git a/3875/CH10/EX10.9/10_9.sce b/3875/CH10/EX10.9/10_9.sce
new file mode 100644
index 000000000..04a390b8f
--- /dev/null
+++ b/3875/CH10/EX10.9/10_9.sce
@@ -0,0 +1,24 @@
+clc;

+clear;

+h=6.63*10^-34 //Plancks constant in Joule-s

+c=3*10^8 //velocity of light in m/s

+lambda1=10^-3 //wavelength in m

+lambda2=100*10^-9 //wavelength in m

+T=1000 //temperature in K

+k_B=1.38*10^-23 //Boltzmann constant in m^2 kg s^-2 K^-1

+d_lambda1=0.1*10^-3 //range of wavelength in m

+d_lambda2=1*10^-9 //range of wavelength in m

+

+//calculation

+//case (a) when the range of wavelength is between 1-1.1 mm

+E=exp((h*c)/(lambda1*k_B*T)) //calculating the exponential term of the eqn

+U_lambda1=((8*%pi*h*c*d_lambda1)/(lambda1^5*(E-1)))

+mprintf("The energy density is = %1.2e J/m^3.\n",U_lambda1)

+

+//case (b) when the range of wavelength is between 100-101 nm

+E1=exp((h*c)/(lambda2*k_B*T)) //calculating the exponential term of the eqn

+U_lambda2=((8*%pi*h*c*d_lambda2)/(lambda2^5*(E1-1)))

+mprintf("The energy density is = %1.2e J/m^3.",U_lambda2)

+//The answer provided in the textbook is wrong.

+

+mprintf("\nThus for shorter wavelengths the energy densities predicted by Rayleigh-Jeans law and Planks law are considerably different while for longer wavelengths the energy densites predicted are same.")

diff --git a/3875/CH10/EX10.9/10_9.txt b/3875/CH10/EX10.9/10_9.txt
new file mode 100644
index 000000000..dd4ecf59d
--- /dev/null
+++ b/3875/CH10/EX10.9/10_9.txt
@@ -0,0 +1,3 @@
+The energy density is = 3.44e-11 J/m^3.

+The energy density is = 1.27e-60 J/m^3.

+Thus for shorter wavelengths the energy densities predicted by Rayleigh-Jeans law and Planks law are considerably different while for longer wavelengths the energy densites predicted are same.
\ No newline at end of file