1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
|
{
"metadata": {
"name": "",
"signature": "sha256:63e794f26755ea447faa48915f48af2a1824429b5991c82dc73f1b261af07c7e"
},
"nbformat": 3,
"nbformat_minor": 0,
"worksheets": [
{
"cells": [
{
"cell_type": "heading",
"level": 1,
"metadata": {},
"source": [
"Chapter11:ULTRASONICS"
]
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Ex11.1:pg-303"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"import math\n",
"#to calculate fundemental frequency\n",
"Y=7.9*10**10 #Young modulus for quartz in Nm**-2\n",
"rho=2.65*10**3 #density of quartz in kg/m**3\n",
"#the velocity of longitudinal wave is given by\n",
"v=math.sqrt(Y/rho) #in m/s\n",
"#for fundamental mode of vibration ,thickness is given by lamda/2\n",
"lamda=2*0.001 #wavelength in m\n",
"nu=v/lamda\n",
"print \"the fundamental frequency is nu=\",round(nu,2),\"Hz\"\n",
"#answer is given wrong in the book ,nu=2730 Hz\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"the fundamental frequency is nu= 2729987.21 Hz\n"
]
}
],
"prompt_number": 2
}
],
"metadata": {}
}
]
}
|
