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Astudent creates a model of a closed ecosystem by filling a glass tank half full with water, then adding 10 snails and two small aquatic plants. the next day, all the snails are dead. what is the most likely cause of their death?
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A90db sound wave strikes an eardrum whose area is 5.0×10^-5m^2. how much energy is absorbed by the eardrum per second
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What is offspring? why does a longer life span mean a higher chance of producing offspring?
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Physics, 23.06.2019 07:00
The doctor lands his tardis on a planet whose radius is 1.2x10^7m the acceleration due to gravity is 18m/s^2. what is the mass of the planet
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How many joules of energy are used by a 2.0 hp motor thats run 1 hr...
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