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BARSIC [14]
3 years ago
11

first to answer correctly gets brainleist! (you dont needa hear that vid thingy tahts just for ppl who cant read or need orial c

ommidations or wtv lol)

Chemistry
2 answers:
Soloha48 [4]3 years ago
7 0
I think the answer is c
AleksAgata [21]3 years ago
3 0

Answer:

The seasons are a result of the tilt of the earth

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In the levels of organization of plants, What are the 2 tissues and their functions?
Valentin [98]
Vascular tissue transports water, minerals, and sugars to different parts of the plant. Vascular tissue is made of two specialized conducting tissues: xylem and phloem. Xylem tissue transports water and nutrients from the roots to different parts of the plant, and also plays a role in structural support in the stem.
4 0
3 years ago
The radioactivity due to carbon-14 measured in a piece of a wood from an ancient site was found to produce 20 counts per minute
ss7ja [257]

Answer:

The answer is "17200 years".

Explanation:

Given:

A = 20 \ \frac{counts}{minute}\\\\A_{o} = 160\ \frac{counts}{minute}

Let the half-life of carbon-14, is beta emitter, is T = 5730\ years

Constant decay \ w = \frac{0.693}{ T}

= 1.209 \times 10^{-4} \ \frac{1}{year}\\

The artifact age t= ?

A = A_{o} e^{-wt} \\\\e^{-wt} = \frac{A}{A_{o}}\\\\-wt = \ln \frac{A}{A_{o}}\\\\= -2.079\\\\t = 1.7199 \times 10^{4} \ years\\\\\sim \ 17200\  years\\

5 0
3 years ago
Identify the items in the list below that are examples of matter. Check all that apply
MArishka [77]

Answer:

what are the items that have been listed?

3 1
4 years ago
Read 2 more answers
A double-replacement reaction takes place when aqueous k2so4 reacts with aqueous pb(no3)2. you would expect the products of this
SpyIntel [72]
A double replacement is when the reactants switch with their opposite charge. For example, AB + CD = AD + BC.

In this case the given is K2SO4 + Pb(NO3)2 = ____ + ____

The answers is PbSO4 and KNO3 would expect the products of this reaction.
8 0
3 years ago
Read 2 more answers
What are the lanthanide & actinide series?
ch4aika [34]

Answer:

 

The lanthanides and actinides together are sometimes called the inner transition elements.

Explanation:

They are called this because they come up in the periodic table after actinium

Hope this helps :)

8 0
3 years ago
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