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Inessa [10]
3 years ago
5

Substances released into the air are known as

Physics
2 answers:
snow_lady [41]3 years ago
5 0

Emissions is the correct awnser :)

irakobra [83]3 years ago
3 0

Your answer is Emissions

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The half life of radium 222 is 38 seconds if you had a 12 gram sample how much would be left after 72 seconds
poizon [28]
<span>3.2 grams The first thing to do is calculate how many half lives have expired. So take the time of 72 seconds and divide by the length of a half life which is 38 seconds. So 72 / 38 = 1.894736842 So we're over 1 half life, but not quite 2 half lives. So you'll have something less than 12/2 = 6 grams, but more than 12/4 = 3 grams. The exact answer is done by dividing 12 by 2 raised to the power of 1.8947. So let's calculate 2^1.8947 power = 12 g / (e ^ ln(2)*1.8947) = 12 g / (e ^ 0.693147181 * 1.8947) = 12 g / (e ^ 1.313305964) = 12 g / 3.718446464 = 3.227154167 g So rounded to 2 significant figures gives 3.2 grams.</span>
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4 years ago
Look at the variables for this lab. Which variable would we have to change in order to change the amount of current flowing thro
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Where are the variables from the lab?
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2 years ago
What is the freezing point of water in Kelvin?
monitta

Answer:

the correct answer is 273.2 k

8 0
3 years ago
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Likurg_2 [28]
Coastline or seashore
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3 years ago
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11111nata11111 [884]

Answer:

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2 years ago
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