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ioda
2 years ago
13

The main source of information used by astronomers to learn about objects in space is.

Physics
1 answer:
Dmitriy789 [7]2 years ago
4 0
Electromagnetic waves
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Which of the following will cause acceleration?
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The correct answer is C.
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What did Galileo discover when he dropped two cannon balls of different weights from the Leaning Tower of Pisa?
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If our year were twice as long (that is, if Earth took twice as many days to complete each orbit around the Sun), but Earth's ro
Flauer [41]

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the four seasons would each be twice as long as they are now

Explanation:

A year is the result of the Earths revolution around the sun i.e., the Earth takes 365 days to complete one revolution around the sun. A day is the result of the Earth's rotation on its axis i.e., it takes 24 hours for Earth to complete one rotation on its axis.

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6 0
3 years ago
If Earth had twice the mass it has now, how would the gravitational force between it and the Sun change?
zhenek [66]

Answer:

a)The gravitational force would be twice as much as it is now

Explanation:

If the earth had twice its mass as it is now, the gravitational force between the sun and the earth would be twice as much as it is now.

According to Newton's law of universal gravitation "the gravitational force of attraction between bodies is directly proportional to the product of their masses and inversely proportional to the square of the distance between them".

       F_{g}   = \frac{G m _{e} m _{s}  }{r^{2} }

G is the universal gravitation constant

m is the mass

r is the distance

let mass of sun  = s

     mass of earth  = e

 new mass of sun  = s

 new mass of sun  = 2e

input variables;

    F  = \frac{Gx e x s}{r^{2} }    ------ i

   F = \frac{G  x s x 2e}{r^{2} }    ------- ii

From the second equation;

      2F  = \frac{Gx e x s}{r^{2} }

      2F  = F

Therefore, the force will double.

7 0
3 years ago
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