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3 years ago

What do we call the area of a solar eclipse where the Moon covers the Sun, but the outline of the Sun can still be seen?

Physics

1 answer:

nadya68 [22]3 years ago

8 0

Umbra during the total solar eclipse earths umbra comepletely covers the moon

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An artificial satellite is in a circular orbit around a planet of radius r= 2.05 x103 km at a distance d 310.0 km from the plane

lubasha [3.4K]

Answer:

$\rho = 12580.7 kg/m^3$

Explanation:

As we know that the satellite revolves around the planet then the centripetal force for the satellite is due to gravitational attraction force of the planet

So here we will have

$F = \frac{GMm}{(r + h)^2}$

here we have

$F =\frac {mv^2}{(r+ h)}$

$\frac{mv^2}{r + h} = \frac{GMm}{(r + h)^2}$

here we have

$v = \sqrt{\frac{GM}{(r + h)}}$

now we can find time period as

$T = \frac{2\pi (r + h)}{v}$

$T = \frac{2\pi (2.05 \times 10^6 + 310 \times 10^3)}{\sqrt{\frac{GM}{(r + h)}}}$

$1.15 \times 3600 = \frac{2\pi (2.05 \times 10^6 + 310 \times 10^3)}{\sqrt{\frac{(6.67 \times 10^{-11})(M)}{(2.05 \times 10^6 + 310 \times 10^3)}}}$

$M = 4.54 \times 10^{23} kg$

Now the density is given as

$\rho = \frac{M}{\frac{4}{3}\pi r^3}$

$\rho = \frac{4.54 \times 10^{23}}{\frac{4}[3}\pi(2.05 \times 10^6)^3}$

$\rho = 12580.7 kg/m^3$

8 0

3 years ago

Use absolute dating in a sentence

Scrat [10]

Answer:

scientists will use absolute dating to find how old a fossil exactly is.

4 0

3 years ago

Read 2 more answers

Which word is not a good way to describe exercise?

Sveta_85 [38]

Exertion is not a good way to describe exercise but there is also alot more words to describe wrong ways for exercise

6 0

3 years ago

LiRa [457]

Answer:

different sample have different properties is not a characteristics of a compound ,

Explanation:

because compound will always same properties no matter how quantity is

6 0

3 years ago

A wave has a wavelength of 7 mm and a frequency of 19 hertz. What is its speed?

ASHA 777 [7]

Speed = (frequency) x (wavelength)

Speed = (19 per second) x (7 mm)

Speed = (19 x 7) (per second · mm)

<em>Speed = 133 mm/sec</em>

or you might want to write <em>Speed = 0.133 m/s</em> .

4 0

3 years ago