Biology

Biology, 24.07.2019 14:20, kristadwsn

What is the energy and matter released by radon gas that causes health concerns called?

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Biology, 26.06.2019 02:00, alyssaboosiefkes

Energy is defined as hyperactivity a caloric measurement the ability to move matter the ability to think and analyze this form of energy is called "energy in motion" or "energy of moving matter" potential energy kinetic energy eletrical energy 1 pt lights on a stage can be examples of all of the following forms of energy except electrical energy light energy thermal energy sound energy when one type of energy changes to another this is called energy conversion loss creation destruction when energy is stored based on their position or shape this is called energy. kinetic potential sound electromagnetic

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Biology, 26.06.2019 02:30, w210138937

Energy is defined as hyperactivity a caloric measurement the ability to move matter the ability to think and analyze this form of energy is called "energy in motion" or "energy of moving matter" potential energy kinetic energy eletrical energy 1 pt lights on a stage can be examples of all of the following forms of energy except electrical energy light energy thermal energy sound energy when one type of energy changes to another this is called energy conversion loss creation destruction when energy is stored based on their position or shape this is called energy. kinetic potential sound electromagnetic

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Physics, 27.06.2019 00:30, rjmarin592ovzbn9

Radioactive gaseous (222,86)rn and (220,86)rn can be produced from the decay of uranium and thorium in rocks and soil. (a) (222,86)rn is a decay product of (238,92)u, while (220,86)rn comes from (232,90)th. how many alpha particles are emitted in the formation of these radon isotopes from their uranium or thorium starting points? can alpha decay alone explain the formation of these radon isotopes? if not, state what other types of decay must occur. (b) can (222,86)rn and (220,86)rn decay by alpha particle emission? write balanced nuclear equations for these two decay processes, and predict for each reaction whether it is allowed or not. the masses of (222,86)rn and (220,86)rn atoms are 222.01757 and 220.01140 u, respectively; those of electron, (4,2)he, (218,84)po and (216,84)po are 0.00055, 4.002602, 218.0089 and 216.00192 u, respectively. (c) calculate the energy released in the alpha decay of one (220,86)rn nuc- leus, in million electron volts and in joules. (d) the half-life of (222,86)rn is 3.82 days. calculate the initial activity of 2.00*10^(-8) g of (222,86)rn, in disintegrations per second. what will be the activity of the (222.86)rn after 14 days? (e) the half-life of (220,86)rn is 54 s. are the health risks of exposure to a given amount of radon for a given short length of time greater or sma- ller for (220,86)rn than for (222,86)rn? radon, being gaseous, post high health risks. explain why radon is a gas.

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Biology, 24.09.2019 12:30, genyjoannerubiera

The sun is the primary source of energy for ecosystems. the sun emits . when an organism obtains nutrients by feeding on other organisms in the ecosystem, energy is used and released. energy changes form, but it isn’t destroyed as it transforms. this scientific law is called the law of first blank. 1. chemical energy 2. mechanical energy 3. radiant energy second blank. 1. conservation of energy 2. conservation of matter 3. transformation of energy

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