Table 1: International Standard Atmosphere ISA sea level temp 273.15°C SPEED DENSITY ALTITUDE RATIO FT. PRESSURE TEMPER- RATIO TEMPER- OF ATURE ATURE SOUND KINEMATIC VISCOSITY RATIO ν 8 •F 8 a KNOTS FT2/SEC 10 1.0000 1.0000 1.0000 59:00 1.0000 661.7 .000158 1000 0.9711 0.9854 0.9644 55.43 0.9931 659.5 .000161 2000 0.9428 0.9710 0.9298 51.87 0.9862 657.2 .000165 3000 0.9151 0.9566 0.8962 48.30 0.9794 654.9 .000169 4000 0.8881 0.9424 0.8637 44.74 0.9725 652.6 .000174 5000 0.8617 0.9283 0.8320 41.17 0.9656 650.3 .000178 6000 0.8359 0.9143 0.8014 37.60 0.9587 647.9 .000182 7000 0.8106 0.9004 0.7716 34.04 0.9519 645.6 .000187 8000 0.7860 0.8866 0.7428 30.47 0.9450 643.3 .000192 9000 0.7620 0.8729 0.7148 26.90 0.9381 640.9 .000197 10000 0.7385 0.8593 0.6877 23.34 0.9312 638.6 .000202 15000 0.6292 0.7932 0.5643 5.51 0.8969 626.7 .000229 20000 0.5328 0.7299 0.4595 -12.32 0.8625 614.6 .000262 25000 0.4481 0.6694 0.3711 -30.15 0.8281 602.2 .000302 30000 0.3741 0.6117 0.2970 -47.98 0.7937 589.5 .000349 35000 0.3099 0.5567 0.2353 -65.82 0.7594 576.6 .000405 *36089 0.2971 0.5450 0.2234 -69.70 0.7519 573.8 .000419 40000 0.2462 0.4962 0.1851 -69.70 0.7519 573.8 .000506 45000 0.1936 0.4400 0.1455 -69.70 0.7519 573.8 .000643 50000 0.1522 0.3902 0.1145 -69.70 0.7519 573.8 .000818 55000 0.1197 0.3460 0.0900 -69.70 0.7519 573.8 .001040 60000 0.0941 0.3068 0.0708 -69.70 0.7519 573.8 .001323 65000 0.0740 0.2721 0.0557 -69.70 0.7519 573.8 .001682 70000 0.0582 0.2413 0.0438 -69.70 0.7519 573.8 .002139 75000 0.0458 0.2140 0.0344 -69.70 0.7519 573.8 .002721 80000 0.0360 0.1897 0.0271 -69.70 0.7519 573.8 .003460 85000 0.0280 0.1673 0.0213 -64.80 0.7613 577.4 .004499 90000 0.0217 0.1472 0.0168 -56.57 0.7772 583.4 .00591 95000 0.0169 0.1299 0.0134 -48.34 0.7931 589.3 .00772 100000 0.0132 0.1149 0.0107 -40.11 0.8089 595.2 .01004 * GEOPOTENTIAL OF THE TROPOPAUSE

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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Question

Determine the sonic velocity in air at sea level and at 10 000, 20 000, and 30 000 ft. Assume standard atmosphere.

Answers :340.2m/s 328.3 m/s 315.9 m/s 303.1m/s

Table 1: International Standard Atmosphere
ISA sea level temp 273.15°C
SPEED
DENSITY
ALTITUDE
RATIO
FT.
PRESSURE TEMPER-
RATIO
TEMPER-
OF
ATURE
ATURE
SOUND
KINEMATIC
VISCOSITY
RATIO
ν
8
•F
8
a
KNOTS
FT2/SEC
10
1.0000
1.0000
1.0000
59:00
1.0000
661.7
.000158
1000
0.9711
0.9854
0.9644
55.43
0.9931
659.5
.000161
2000
0.9428
0.9710
0.9298
51.87
0.9862
657.2
.000165
3000
0.9151
0.9566
0.8962
48.30
0.9794
654.9
.000169
4000
0.8881
0.9424
0.8637
44.74
0.9725
652.6
.000174
5000
0.8617
0.9283
0.8320
41.17
0.9656
650.3
.000178
6000
0.8359
0.9143
0.8014
37.60
0.9587
647.9
.000182
7000
0.8106
0.9004
0.7716
34.04
0.9519
645.6
.000187
8000
0.7860
0.8866
0.7428
30.47
0.9450
643.3
.000192
9000
0.7620
0.8729
0.7148
26.90
0.9381
640.9
.000197
10000
0.7385
0.8593
0.6877
23.34
0.9312
638.6
.000202
15000
0.6292
0.7932
0.5643
5.51
0.8969
626.7
.000229
20000
0.5328
0.7299
0.4595
-12.32
0.8625
614.6
.000262
25000
0.4481
0.6694
0.3711
-30.15
0.8281
602.2
.000302
30000
0.3741
0.6117
0.2970
-47.98
0.7937
589.5
.000349
35000
0.3099
0.5567
0.2353
-65.82
0.7594
576.6
.000405
*36089
0.2971
0.5450
0.2234
-69.70
0.7519
573.8
.000419
40000
0.2462
0.4962
0.1851
-69.70
0.7519
573.8
.000506
45000
0.1936
0.4400
0.1455
-69.70
0.7519
573.8
.000643
50000
0.1522
0.3902
0.1145
-69.70
0.7519
573.8
.000818
55000
0.1197
0.3460
0.0900
-69.70
0.7519
573.8
.001040
60000
0.0941
0.3068
0.0708
-69.70
0.7519
573.8
.001323
65000
0.0740
0.2721
0.0557
-69.70
0.7519
573.8
.001682
70000
0.0582
0.2413
0.0438
-69.70
0.7519
573.8
.002139
75000
0.0458
0.2140
0.0344
-69.70
0.7519
573.8
.002721
80000
0.0360
0.1897
0.0271
-69.70
0.7519
573.8
.003460
85000
0.0280
0.1673
0.0213
-64.80
0.7613
577.4
.004499
90000
0.0217
0.1472
0.0168
-56.57
0.7772
583.4
.00591
95000
0.0169
0.1299
0.0134
-48.34
0.7931
589.3
.00772
100000
0.0132
0.1149
0.0107
-40.11
0.8089
595.2
.01004
* GEOPOTENTIAL OF THE TROPOPAUSE
Transcribed Image Text:Table 1: International Standard Atmosphere ISA sea level temp 273.15°C SPEED DENSITY ALTITUDE RATIO FT. PRESSURE TEMPER- RATIO TEMPER- OF ATURE ATURE SOUND KINEMATIC VISCOSITY RATIO ν 8 •F 8 a KNOTS FT2/SEC 10 1.0000 1.0000 1.0000 59:00 1.0000 661.7 .000158 1000 0.9711 0.9854 0.9644 55.43 0.9931 659.5 .000161 2000 0.9428 0.9710 0.9298 51.87 0.9862 657.2 .000165 3000 0.9151 0.9566 0.8962 48.30 0.9794 654.9 .000169 4000 0.8881 0.9424 0.8637 44.74 0.9725 652.6 .000174 5000 0.8617 0.9283 0.8320 41.17 0.9656 650.3 .000178 6000 0.8359 0.9143 0.8014 37.60 0.9587 647.9 .000182 7000 0.8106 0.9004 0.7716 34.04 0.9519 645.6 .000187 8000 0.7860 0.8866 0.7428 30.47 0.9450 643.3 .000192 9000 0.7620 0.8729 0.7148 26.90 0.9381 640.9 .000197 10000 0.7385 0.8593 0.6877 23.34 0.9312 638.6 .000202 15000 0.6292 0.7932 0.5643 5.51 0.8969 626.7 .000229 20000 0.5328 0.7299 0.4595 -12.32 0.8625 614.6 .000262 25000 0.4481 0.6694 0.3711 -30.15 0.8281 602.2 .000302 30000 0.3741 0.6117 0.2970 -47.98 0.7937 589.5 .000349 35000 0.3099 0.5567 0.2353 -65.82 0.7594 576.6 .000405 *36089 0.2971 0.5450 0.2234 -69.70 0.7519 573.8 .000419 40000 0.2462 0.4962 0.1851 -69.70 0.7519 573.8 .000506 45000 0.1936 0.4400 0.1455 -69.70 0.7519 573.8 .000643 50000 0.1522 0.3902 0.1145 -69.70 0.7519 573.8 .000818 55000 0.1197 0.3460 0.0900 -69.70 0.7519 573.8 .001040 60000 0.0941 0.3068 0.0708 -69.70 0.7519 573.8 .001323 65000 0.0740 0.2721 0.0557 -69.70 0.7519 573.8 .001682 70000 0.0582 0.2413 0.0438 -69.70 0.7519 573.8 .002139 75000 0.0458 0.2140 0.0344 -69.70 0.7519 573.8 .002721 80000 0.0360 0.1897 0.0271 -69.70 0.7519 573.8 .003460 85000 0.0280 0.1673 0.0213 -64.80 0.7613 577.4 .004499 90000 0.0217 0.1472 0.0168 -56.57 0.7772 583.4 .00591 95000 0.0169 0.1299 0.0134 -48.34 0.7931 589.3 .00772 100000 0.0132 0.1149 0.0107 -40.11 0.8089 595.2 .01004 * GEOPOTENTIAL OF THE TROPOPAUSE
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