已知椭圆C:x^2+/3 +y^2/2=1与L交于Q(xy),P(xy),S△OPQ=6^0.5/2,O为原点,证X1^2+X2^2,Y1^2+Y2^2为定值
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山东理工数学36题,详细解答见：
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扫描下载二维码Problem 17A
1) 38.7 cm 2) 58.5.cm 3) 1.15 m 4) -143 N 5) 3.50 x 10^-4 N6) 1.4 x 10^-3 N 7) 1.60 x 10^-19 C 8) 1.60 x 10^-19 C 9) 1.60 x 10^-19 C 10) 2.2 x 10^-17 C
Problem 17B
1) F(tot)=1.8 x 10^-10 N, 45? 2) 2.24 x 10^10 N pointing upward along the y-axis 3) F(tot)=1.74 x 10^-7 N, -21.22? 4) 3.84 x 10^-6 N directected along the -y axis 5) F(tot)=4.82 x 10^-19 N, 45? 6) F(tot)=4.53 x 10^-6 N, 26.6? 7) F(tot)=3.97 x 10^-8 N, 9.29? 8) F(x,tot)=7.2x10^4 N, F(y,tot)= -1.8 x 10^4 N, F(tot)=7.4 x 10^4 N, -14? 9) F(tot)=3.66 x 10^5 N, 45? 10) F(tot)=0 N along the x axis
Problem 17C
1) -1.7 x 10^-1 N 2) 18 N 3) 259 N 4) 16 cm 5) 36 cm 6) 7.3 cm
Problem 17D
1) -54 N in the -x direction 2) 7.5 x 10^-6 N in the +y direction 3) -3.29 x 10^-14 N upward 4) 4.40x10^5 N/C, 89.1? 5) 3.15 x 10^5 N/C 6) 5.06 x 10^-12 C 7) 1.61 x 10^-12 C 8) 3.6 x 10^-10 m 9) -0.67 mm 10) -1.37 x 10^-7 m
Section 17-1 Review, page 633
1) It is equal to the magnitude of the rod' Charge is conserved. 2) Charge is quantized. 3) 6.25 x 10^19 electrons 4) The taped induces a surface charge on the desk, so the two are attracted to one another. 6) More paint hits the object being painted because of an electrical attraction between the chargted droplets and the oppositely charged object.
Section 17-2 Review, page 642
1a) 4.4 N b) attractive c) 1.2 x 10^13 electrons 2) both are field forces, both are electric forces are attractive or repulssive whnile gravitational forces are always attractive, electric force is significantly stronger than gravitational force 3) 7.3 x 10^-8 N, along the negative x axis 4) 35.2 cm from q(1) (24.8 cm from q(2)) 5) new distance = 1/sqrt(2)(old distance)
Section 17-3 Review, page 652
1) 8.0 x 10^3 N/C, directed toward the 40.0 x 10^-9 C charge 2a) -3/8 b) q(1) q(2) is positive 3a) All lines should point away from the two charges, and one charge should have four time as many lines as the other. b) All lines should point toward the tow charges, and one charge should have four times as many lines as the other. 4) because charge accumulated at sharp points 5) They experience an electrical attraction that pulls them back toward the object.
Section 17-1 Worksheet
1a) Experiment A, no charges were transferred. Experiment B, charges were tranferred between the sphere and the ground. Experiment C, Charges were transferred between the sphere and the rod. b) Diagrams should show: Spher A, negative charges (-) on the left, positive (+) Sphere B, excess (-) Sphere C, excess (+) d) Experiment A e) no change in Experiment A or Experiment B; reduced charge in Experiment C
Section 17-2 Worksheet
1a) 20.0 cm b) 0.899 N (attraction along the line q(1)-q(3)) c) 0.899 N (attraction along the line q(1)-q(2)) d) 1.40 N repulsion pulling to the right e) Diagrams should show F(1) pointing from q(3) toward q(1) and F(2) pointing from q(3) toward q(2) f) 36.9? g) F(1x)=-0.709 N; F(2x)=0.719 N; F(1Y)=-0.540 N; F(2y)=-0.540 N h) -1.08 N pointing down i) downward along the y-axis
Section 17-3 Worksheet
1a) 21.2 cm b) all same strength of 1.60x10^-6 N/C along the diagonal lines, with E(1) pointing away from q(1), E(2) from q(2), E(3) from q(3), and E(4) from q(4) c) Resultant electric field E=0 2a) 4.61x10^-14 N down b) 4.61x10^-14 N up c) 1.44x10^-18 C d) 9 electronsS=(1/2)*OA)y=(1/2)*5*(-x+6)=15-5x/2.是什么意思？_百度知道
S=(1/2)*OA)y=(1/2)*5*(-x+6)=15-5x/2.是什么意思？
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出门在外也不愁在曲线x^2/2+y^2/6=1的内接三角形pAB中，pA，pB的倾斜角互补，且、角xOp=60度(x为横坐标) 求直线AB的..._百度知道
在曲线x^2/2+y^2/6=1的内接三角形pAB中，pA，pB的倾斜角互补，且、角xOp=60度(x为横坐标) 求直线AB的...
pB的倾斜角互补，pA;6=1的内接三角形pAB中;2+y^2&#47在曲线x^2&#47，且
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