Tag: sunita's experience in space

Quizzes (0) Questions (98)

Questions Related to sunita's experience in space

Multiple choice evs - i our earth and our solar system solar system and sun planets and stars planets sunita's experience in space space exploration

_____ and ___ are the only planets without moons.

  1. Mercury,Venus

  2. Mars,Venus

  3. Jupiter,Saturn

  4. Earth,Mercury
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Planet                              Moons(Number)                                        

Mercury                              0
Venus                                 0
Earth                                   1
Mars                                   2
Jupiter                                67
Saturn                                 62
Uranus                                27 
Neptune                              14
Pluto                                    5

Only Venus and Mercury does not have any moon.

Multiple choice evs - i our earth and our solar system solar system and sun planets and stars planets sunita's experience in space space exploration

The following planet is considered as Earths-twin

  1. Mars

  2. Venus

  3. Mercury

  4. Saturn
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Venus is called Earth's twin because Venus and Earth are almost the same size, have about the same mass (they weigh about the same), and have a very similar composition (are made of the same material). They are also neighboring planets. However, Venus and Earth are also very different. Venus has an atmosphere that is about 100 times thicker than Earth's and has surface temperatures that are extremely hot. Venus does not have life or water oceans like Earth does. Venus also rotates backwards compared to Earth and the other planets.

Multiple choice evs - i our earth and our solar system solar system and sun planets and stars planets sunita's experience in space space exploration

Early astronomers were confused because the following planets sometimes reverse their direction:

  1. Mars

  2. Jupiter

  3. Saturn

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The phenomenon of retrograde motion, where planets appear to reverse their direction in the sky, is observed for all superior planets, including Mars, Jupiter, and Saturn.

Multiple choice evs - i our earth and our solar system solar system and sun planets and stars planets sunita's experience in space space exploration

If earth suddenly stops rotating, then the weight of an object of mass $m$ at equator will [$\omega$ is angular speed of earth and $R$ is its radius ] :

  1. Decrease by $m\omega^2R$

  2. Increase by $  m\omega^2R$

  3. Decrease by $m\omega R^2$

  4. Increase by $  m\omega R^2$
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
Weight when the earth rotates is
$m{g}^{\prime}=mg-mR{\omega}^{2}$
When $\omega=0$
The weight will increase by $mR{\omega}^{2}$
Multiple choice evs - i our earth and our solar system solar system and sun planets and stars planets sunita's experience in space space exploration

If you were asked to carry a 10 kg mass piece on each of the planets, select the planets in order, from the one where you would find it lightest to the one where it would be the heaviest

  1. Mercury-Venus-Earth-Mars-Jupiter

  2. Jupiter-Mars-Earth-Venus-Mercury

  3. Mercury-Mars-Venus-Earth-Jupiter

  4. Mars-Mercury-Venus-Earth-Jupiter
Reveal answer Fill a bubble to check yourself
A Correct answer