Approximately how many asteroids that are 0.89 km in radius would it take to make a planet which has a radius of 6590.0 km?
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Approximately how many asteroids that are 0.89 km in radius would it take to make a planet which has a radius of 6590.0 km?
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- A certain exoplanet has an eighth of the mass of the Earth and half its diameter. The escape velocity on the exoplanet is ________ times the escape velocity on the Earth. A 1/4 B 1/2 C 2 D 4The asteroid Pallas has a mass of 2.11 ✕ 1020 kg and an average radius of about 256 km (2.56 ✕ 102 km). What is its escape velocity (in m/s)? (Hints: Use the formula for escape velocity ; remember to convert units to m, kg, and s.)________ m/sA new asteroid is discovered to have an orbital period of 4.685 yrs. Calculate the average orbital radius in kilometers.
- How many orders of magnitude do you need to grow in spatial scale (size) to form a planet? Let's take the extreme ends of this scale, from a dust particle of radius a = 10-6m to the gas giant Jupiter (you can round up its radius to the nearest ten to keep it simple). What else has this difference in order of magnitude? Maybe pick something that's not a length scale. Be creative!Jupiter's moon, Io, loses about 1070.0 kg/s of sulfur dioxide to Jupiter's magnetosphere. Sulfur dioxide currently makes up 0.9 % of Io's mass. How long in years until Io runs out of sulfur dioxide at the current loss rate? Io has a mass of 1 × 1023 kg and there are 3.15 × 107 seconds in a year. incorrectA comet has a period of 75.3 years and moves in an elliptical orbit in which its perihelion (closest approach to the Sun) is 0.640 AU. Find the semimajor axis of the comet and an estimate of the comet's maximum distance from the Sun, both in astronomical units. (a) the semimajor axis of the comet (in AU) (b) an estimate of the comet's maximum distance (in AU) from the Sun