There are 6 Questions [1] An asteroid is in the shape of sphere and has a mass o
ID: 2114522 • Letter: T
Question
There are 6 Questions
[1] An asteroid is in the shape of sphere and has a mass of 1000 kilograms. Determine the density (in grams per cubic centimeter) of this asteroid if its diameter is known to be 1.2 meters. Useful information: 1 kg = 1000 g, 1 m = 100 cm, volume of sphere = 4/3 pi r^3. Remember that the radius of a sphere is equal to half its diameter! Show all of your work.
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[2] How does your calculated density (in grams per cubic centimeter) compare to the density of water? Would you expect this asteroid to float or sink in water based on your calculations?
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[3] One side of our asteroid is constantly illuminated by the Sun while the other side remains in the dark. Do you expect there to be a temperature difference between the light and dark sides? Explain why or why not? If the two sides are at different temperatures, how might heat transfer from one side to the other? Note that our asteroid does not have enough gravity to hold an atmosphere.
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[4] Occasionally an asteroid will break into fragments due to a collision. These fragments can leave the asteroid belt and some even make their way to Earth. Upon entering the Earth's atmosphere a fragment is heated to high temperature by frictional forces. What would happen to any water-ice contained within a fragment? Is this type of change considered a chemical change or a physical change? Explain.
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[5] Asteroids are mainly composed of metals like iron and non-metals like carbon. Briefly explain the differences between metals and non-metals based on your knowledge of the periodic table.
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[6] If the asteroid fragment contains carbon, it may burn when entering the Earth's atmosphere. What is the most likely compound to result from this process? Which type of chemical bond would result from this process? Of the two broad classes of chemical reactions mentioned in this course, which type would this be? Be sure to fully explain all of your answers.
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Explanation / Answer
1) density = m/v = 1000/(pi*1.2^2) = 221.05 kg/m^3 = 0.221 gm/cc
2) density of water = 1 gm/cc, since the density of asteroid (0.221gm/cc) is less than water, it will float on water
3) There will be a temperature difference between the two sides since one side is constantly gaining energy and the other is not. Heat would be transferred by conduction.
4) Any ice/water contained in the asteroid will evaporate, this is considered a physical change as no chemical reaction takes place.
5)
Chemical Properties
Metals
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