75. 3,010-8 , , 2,4 10-6 . .
76. , 100 /, , 1,010-4 ?
77. 5,0 1,5106./. .
78. 1,010-4 300 /?
79. , 10-6 3,010-5 ? , , 100 .
80. 2 0,4 . .
81. 12 , , 2 /?
82. 10 /?
83. 36 , 9 18 .
84. 110-8 , .
85. , 100 /. 6000 .
86. 9,0108 /. , ? ?
87. 110-6 3,210-17 . , ?
88. 1 2 10 . , , 9 7 .
89. 3 4 , , 20 /. ?
90. . , 29 ?
91. 0,18 1800 /3 900 /3. , , 45 /, . .
92. : Q1 = 30 Q2 = 10 . d 20 . , r1 = 15 r2 = 10 .
93. 4410-5 0,60 . .
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94. , q1 = 18∙10-9 q2 = 16∙10-9 . r = 0,2 .
95. q1 = 40 q2 = 10 , d = 10 . , r1 = 12 r2 = 6 .
96. 1 1 10 . , 6 8 .
97. 0,1 6 . , 5 . : ) ; ) , .
98. , 4 , . , : ) , ) ?
99. 40 / 27 . 9 , : ) , ; ) , .
100. +q, +q, -q. .
101. = 105 /. t = 1 , .
102. r = 0,51010 . E . .
103. Q1 =40 Q2 = = 10 , d = 10 . , r1 = 12 r2 = 6 .
104. , σ =1 /2. E .
105. R =10 Q = 1 . E : 1) r1 = 8 ; 2) ; 3) r2 = 15 .
106. R1 = 6 R2 = 10 Q1 = 1 Q2 = 0,5 . E , r1 =5 , r2 =9 r3 =15 . E(r).
107. , τ = 30 /. a = 20 r = 1 . , β = 30 , .
108. d = 5 l = 4 Q = 500 . E , a = 1 .
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109. R1 = 2 R2 = 4 , τ1 = 1 / τ2 = - 0,5 /. . , r1 = 1 , r2 = 3 , r3 = 5 . (r).
110. l = 10 τ = 3 /. E, , , .
111. l = 12 τ = 200 /. , r = 5 .
112. l = 10 τ =400/. E , , , r =8 .
113. 0,2 /. 2 .
114. , τ1 = τ2 = 6∙10 5 / r1 = 0,2 . , a = 0,2 .
115. 10 . 2 /, +4 /. , 6 , 8 .
116. 10 0,2 . .
117. 5 , 210-6 ?
118. 10-6 /2.
119. σ1 = 0,4 /2 σ2 = 0,1 /2. , .
120. , (σ = 1 /2). E : 1) ; 2) . , .
121. , σ1 = 1 /2 σ2 = 3 /2. E : 1) ; 2) . , .
122. . ?
123. , 354 /2.
124. , , , . 60 /. , , .
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125. 40 /2 . .
126. σ1 = 10 /2 σ2 = - 30 /2. , S, 1 2.
127. R = 5 , ρ = 10 /3. E D : 1) r1 = 3 ; 2) ; 3) r2 = 10 .
(r) D(r).
128. , R1 = 2 R2 = 4 , τ1 = 1/ τ2 = 4 / . E , r1 = 1 , r2 = 3 r3 = 5 .
129. , a = 10 b = 15 , ( ) . Q1 = 50 , Q2 = 150 . .
130. 0,20 , 410-8 ?
131. 9,010-8 1,0 . ? 2,0 ? ?
132. . ρ = 100 /3. R1 5 , R2 = 10 . E D , : 1) r1 = = 3; 2) r2 = 6 ; 3) r3 = 12 .
133. R = 2 , ρ = 10 /3. E D , : 1) r1 = 1 ; 2) r2 = 3 . . E(r) D(r).
134. d =1 , ρ = 100 /3. E : , .
135. q = 2 R = 40 . E r = 4 .
136. , , 45. 1/10 ? .
137. 3 16 . , 2 4 .
138. σ. , , .
