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4 years ago

7

A total star eclipse occurs when the moon passed between the sun and the earth causing the sky to go dark. The length of darknes

s during 1999 total solar eclipse was 2 1/3 minutes. The length for one in 2003 was 1 5/6 minutes. How much long was the eclipse in 1999

1 answer:

skad [1K]4 years ago

8 0

2 minutes and 23 seconds

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Find the midpoint between two points on a coordinate plane whose coordinates are (5.7) and (-3, 1).

jok3333 [9.3K]

Answer:

(1,4)

Step-by-step explanation:

$if~(x,y)~is~mid~point~of~(x_{1},y_{1})~and~ (x_{2},y_{2}~then\\x=\frac{x_{1}+x_{2}}{2} \\y=\frac{y_{1}+y_{2}}{2} \\x=\frac{5-3}{2} =\frac{2}{2}=1\\y=\frac{7+1}{2} =\frac{8}{2} =4$

(x,y)→(1,4)

6 0

2 years ago

100 POINTS<br><br>Find the first five terms of the recursive sequence<br><br>An=-6An-1 where A1=4.5

kotykmax [81]

An=-6An-1 where A1=4.5

A2 = -6(4.5) = -27

A3 = -6(-27) = 162

A4 = -6(162) = -972

A5 = -6(-972) = 5,832

4 0

3 years ago

Read 2 more answers

A 12-cm-long thin rod has the nonuniform charge density λ(x)=(2.0 nC/cm)e−|x|/(6.0 cm), where x is measured from the center of t

Inessa [10]

Answer:

the total charge is

$Q=24(1-\exp(-1))nC\approx15.171nC$

Step-by-step explanation:

Since x is measured from the center, that means that x=0 is the center so the edges of the rod correspond to x=-6 and x=6. that meas that the total charge can be calculated as

$Q=\int^{6}_{-6}2\exp\left(\frac{-|x|}{6}\right)dx$

separating the integral from -6 to 0 and from 0 to 6, taking into account that |x|=-x for x<0 and |x|=x for x >=0, we get $Q=\int^{0}_{-6}2\exp\left(\frac{x}{6}\right)dx+\int^{6}_{0}2\exp\left(\frac{-x}{6}\right)dx$

using the substitution x=-u in the first integral we get $\int^{0}_{-6}2\exp\left(\frac{x}{6}\right)dx=-\int^{0}_{6}2\exp\left(\frac{-u}{6}\right)du=\int^{6}_{0}2\exp\left(\frac{-u}{6}\right)du$

which is the same as the first integral. Thus, the total charge is given by

$Q=2\int^{6}_{0}2\exp\left(\frac{-x}{6}\right)dx$

integrating we get

$Q=4(-6\exp\left(\frac{-x}{6}\right))\big|^{6}_{0}=-24(\exp(-6/6)-\exp(0))=24(1-\exp(-1))$

4 0

3 years ago

2.85 rounded to the nearest hundredth

Annette [7]

I got 2.9 as an answer

7 0

4 years ago

Read 2 more answers

Segment CD has an endpoint at C(2, -1) and a midpoint at M(8,3). What is the coordinate of point D? Explain.

N76 [4]

Answer

Graph?

Step-by-step explanation:

5 0

3 years ago