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Leviafan [203]
3 years ago
13

Oil _____.

Physics
2 answers:
timurjin [86]3 years ago
6 0
Oil is made from buried remains of plants and animals.
Oksana_A [137]3 years ago
5 0

The correct answer is is made from buried remains of plans and animals.

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Which of the following characteristics do all unicellular organisms share?
Fed [463]

Answer:

Asexual production they can be eukaryotes or prokaryotes

Explanation:

8 0
3 years ago
Iodine 131 half life is 8.0 days. Ten percent of the original sample o his isotope remains after (a) 22.7 days (b) 24.9 days (c)
Artyom0805 [142]

Answer:

option (c) is correct

Explanation:

Half life of a substance is the time in which the element becomes half of is initial value.

half life, T = 8 days

Amount remaining, N = 10 % of original value

Let the original value is No.

N = 10% of No

N = 0.1 No

Let the time taken is t and the decay constant is λ.

The relation between the decay constant and the half life is given by

\lambda =\frac{0.6931}{T}=\frac{0.6931}{8}=0.08664 per day

Us the equation of radioactivity

N=N_{0}e^{-\lambda t}

0.1N_{0}=N_{0}e^{-0.08664 t}

e^{0.08664 t}=10

Taking natural log on both the sides, we get

0.08664 t = 2.303

t = 26.6 days

4 0
3 years ago
Children in a tree house lift a small dog in a basket 4.00 m up to their house. If it takes 187 J of work to do this, what is th
Vika [28.1K]
A=Fh
A - work
F - force
h - distance

F=mg
m - mass (god+basket)

so
A=mgh
187 = m*10*4
187=40m
m=187/40
m=4.675 kg
or 4kg and 675g

pretty small dog...
6 0
3 years ago
Of elements N, O, Cl, Na, and Which two would likely have similar chemical properties and why
velikii [3]
<span>Oxygen and Nitrogen would be the most similar of the elements listed, because they are the closest in the periodic table. This isn't a very good reason for anything, but the two do have some similar properties. They are both non-metals, they are both highly electronegative, they are both diatmoic gasses in their natural states, they have a similar number of valence electrons, they are both generally oxidizing agents. Oxygen and Chlorine are also quite similar, but not quite as similar as Oxygen and Nitrogen.</span>
3 0
3 years ago
Simplify<br><br>3+7b+2+2b<br><br>I need to learn how to simplify please<br>​
AVprozaik [17]

<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3

Answer:

Let's simplify step-by-step.

3 + 7b + 2 + 2b

Combine Like Terms:

= 3 + 7b + 2 + 2b

= ( 7b + 2b ) + ( 3 + 2 )

= 9b + 5

Answer:

= 9b + 5

<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3<3

5 0
3 years ago
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