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maxonik [38]
3 years ago
9

which of the following small bodies are the hardest to tell apart because they are made of similar materials ? A . dwarf planets

and comets. . b. asteroids and comets . . c. comets and metoroids . . d. asteroids and meteroids
Physics
2 answers:
grandymaker [24]3 years ago
8 0
Option D is right that is asteroids and meteroids.
Svetllana [295]3 years ago
6 0

Answer: d. asteroids and meteoroids

Explanation:

A comet is made of rocks and frozen gases and is found in the outskirts of the solar system. A dwarf planet is large in size and round in shape as compared to an asteroid and has rocky composition.

Asteroids and meteoroids are rocky in composition and have irregular shape and size. Majority of the asteroids are found in between the orbits of Mars and Jupiter. These are thought to form from an unformed planet. Meteoroids are debris of planets and comets. Thus, it is difficult to distinguish between the two because of the similar materials.

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v = 7.69 x 10³ m/s = 7690 m/s

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In order for the satellite to orbit the earth, the force of gravitation on satellite must be equal to the centripetal force acting on it:

F_{gravitation}= F_{centripetal}\\\\\frac{GM_{s} M_{E}}{r^2}  = \frac{M_{s} v^2}{r}\\\\\frac{GM_{E}}{r} = v^2\\\\v = \sqrt{\frac{GM_{E}}{r} } \\\\

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v = orbital speed = ?

Therefore,

v = \sqrt{\frac{(6.67 x 10^{-11}N.m^2/kg^2)(5.97 x 10^{24} kg)}{6.732 x 10^6 m} }\\\\

<u>v = 7.69 x 10³ m/s</u>

For time period satellite completes one revolution around the earth. It means that the distance covered by satellite is equal to circumference of circle at the given altitude.

So, its orbital speed can be given as:

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T = Time Period of Satellite = ?

Therefore,

T = \frac{2\pi r}{v}\\\\T = \frac{(2\pi )(6.732 x 10^6 m}{7.69 x 10^3 m/s}\\\\

<u>T = 5500 s = 91.67 min = 1.53 h</u>

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