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kupik [55]
3 years ago
5

What are the two groups of zooplankton?

Advanced Placement (AP)
2 answers:
Ilia_Sergeevich [38]3 years ago
8 0
Metro plankton and Holoplankton
guajiro [1.7K]3 years ago
6 0
Tamam öğretmenim teşekkür ederim öğretmenim merhaba hocam nasılsınız iyi akşamlar canım çok teşekkür ederiz çok güzel bir insan bir arar bir şey olmaz sen
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With a half life of 28.8 years, how long will it take 1g of strontium-90 to decay to 250 mg
soldier1979 [14.2K]

The time it takes for 1g of strontium-90 to decay to 250 mg is; 57.6 years

<h3>What is the half life of an element?</h3>

The formula for half life is;

A(t) = A₀ * (¹/₂)^(t/t_1/2)

Where;

A(t) is amount left after t years

A₀  the initial quantity of the substance that will undergo decay;

t_1/2 is the half-life of the decaying quantity.

We are given;

t_1/2 = 28.8 years

A₀ = 1 g

A(t) = 250 mg = 0.25 g

Thus;

0.25 = 1 *  (¹/₂)^(t/28.8)

log 0.25 = (t/28.8) log (1/2)

-0.60206 = (t/28.8) * -0.3010

t = 2 * 28.8

t = 57.6 years

Read more about half life at; brainly.com/question/11152793

6 0
2 years ago
Which type of migration best describes a move from the suburbs to a nearby city?
vladimir1956 [14]

Answer:

D. Interregional migration best describes a move from the suburbs to a nearby city.

Please Mark Brainliest If This Helped!

8 0
2 years ago
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How does the electoral college work
Mars2501 [29]
Despite popular belief, the U.S. Constitution does not provide for the popular election of the American president. It provides for popular election of presidential electors. Each candidate who qualifies for a given state's ballot must designate certain individuals who will serve as his or her electors if that candidate wins the popular vote in that state.

When each state certifies a winner of its overall popular vote, that winner is entitled to send all his or her electors to that state's Capitol, where they will officially record their votes for their candidate. All the electors in all the states do it on the same day, the first Monday after the second Wednesday of December. This year it is Dec. 19, which is the latest it can be, just as this year's Election Day is the latest it can be.
3 0
3 years ago
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Psychoactive drugs are __________.
garik1379 [7]

Answer:

drugs capable of influencing perception, mood, cognition, or behavior

6 0
3 years ago
PLS HELPPPPP
andriy [413]

Answer:

M=0.09 mol/L

Explanation:

M=mol/volume

M=0.06 mol/0.656 L(convert 656 ml to L by ÷ by 1000)

M=0.09 mol/L

3 0
3 years ago
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