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leva [86]
3 years ago
10

Please help, all about Mirrors and Lenses

Physics
1 answer:
romanna [79]3 years ago
3 0
Answer: I think it’s 20cm.
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The half-life of carbon-14 is 5730 years. Explain how to figure out the age of a substance that has 25% carbon-14 remaining. A)
snow_lady [41]

Answer:

C

Explanation:

25% is two half lives.

Each half life requires 5730 years.

So two half lives requires  

2

×

5730

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How might deforestation lead to desertification
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If we keep cutting down tree's and if there are enough forest fires then it will turn into a desert....Hope it helps! 
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Which is the FALSE statement about CI-? (A. It is a cation.) (B. It is an anion.) (C. It has gained an electron.) (D. It has mor
densk [106]

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It should be A

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Qroups of specialized cells that work together are called____
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4 0
3 years ago
The quantum state of a particle can be specified by giving a complete set of quantum numbers (n,l, ml, ms). How many different q
Delvig [45]

Answer:

number of quantum states =  8

Explanation:

To find the total number of allowed states you take into account the following relations:

l=n-1\\\\m_l=-l,-(l-1),...,0,,,,(l-1),l

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n=2\\\\l=0,1\\\\m_0=0\\\\m_1=-1,0,1

furthermore, for each n,l,ml quantum state you have two additional states due to the spin of the electrons.

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number of quantum states = 2*(1+3) = 8

4 0
4 years ago
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