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What fraction of U-238 atoms present at 1 half-life remain after 2 half-lives?
Wiki User
∙ 11y ago
1/2 (50%) of them.
Wiki User
∙ 11y ago
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What fraction of the original c14 would you expect to be present in a fossil that is twenty eight thousand six hundred and fifty years old?
The half-life of C14 is 5730 years so the given period is 5 half-lives. You should, therefore, expect approx 2-5 = 0.03125 of the original C14 to remain.
When shannon has read two fifths of the bookwhat fraction will she still have left to read?
3/5 would remain. 1 - 2/5 = 3/5.
What is the mixed number equivalent to 3.750?
To get the mixed number of 3.750, first separate the whole number - that will remain constant. So you have 3 and 750/1000 (the fraction equivalent to .750) Now all you need to do is simplify the fraction. Both the numerator and the denominator are divisible by 250. Through simplifying, the fraction would be 3/4. Now just put the two numbers together, and the answer is 3 3/4.
How much Cu-61 (half-life about 3 hours) would remain from 2 mg sample after 6 hours?
6 hours = 2 half lives, thus 25 % would remain. 0.25 x 2 mg = 0.5 mg.Done another way...fraction remaining = 0.5^n where n = number of half lives = 6hr/3hr = 2fraction remaining = 0.5^2 = 0.250.25 x 2 mg = 0.5 mg
What does remain mean in math?
Remain, or remainder, is the amount left over when one number is divided into another, but doesn't divide equally. For example, 25 divided by 6 is 4, with a remainder of 1.
What is the present tense of remain?
the present tense of remain is remain
How long does it take to make uranium?
The isotope U-238 has a halflife of 4.5 billion years, roughly the current age of the earth. As the sun is expected to consume the earth in about 6 billion years from now, less than 1.5 halflives will have passed by then. Therefore uranium will remain in the environment as long as earth exists, although at slowly decreasing levels.
Is remain a past present or future tense?
Remain is present tense. The past tense is remained, and the future tense is will remain.
After three half-lives what fraction of a radioactive sample will remain?
Approx 1/8 will remain.
How much of one gram of radium-226 will remain unchanged after four half-lives?
After each half-life, half of the radium-226 will decay. Therefore, after four half-lives, 1/2^4 or 1/16th of the original gram of radium-226 will remain unchanged. This means that 1/16th of a gram, or 0.0625 grams, will still be unchanged after four half-lives.
What fraction of a radium sample will remain after 3240?
The answer depends on 3240 WHAT: seconds, days, years?
What are the odds of a terrorist attack on the US?
It remain an ever present and real threat.
How do you change 2 13 into an improper fraction?
2/13 cannot be written as an improper fraction since [the absolute value of] its numerator is less than [the absolute value of] its denominator. It will remain a proper fraction.
How do you write 2 and 3 over 8 as improper fraction?
The numerator of the improper fraction will be 2*8 + 3 = 19 and the denominator will remain the same as that for the fractional part of the mixed fraction. So the improper fraction is 19/8.
Is remain an adverb?
No. Remained is the past tense and past participle of the verb (to remain), but for this verb there is no adverb for this or the adjective / present participle remaining).
What fraction of uranium 235 is left after 1400 million years?
25 % uranium remain, 75 % is disintegrated.
What substance is present in tap water after evaporation?
A small amount of insoluble residue remain.
