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Leno4ka [110]
3 years ago
11

Which of the following is true about technology and science

Chemistry
1 answer:
galben [10]3 years ago
4 0

Answer:

car

Explanation:

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The orange color of carrots and orange peel is due mostly to β-carotene, an organic compound insoluble in water but soluble in b
gogolik [260]

Answer:

First Method: Vacuum Distillation and Chromatographic separation of the remains that were precipitated out from the peel.

Second Method: Extraction of components from orange peels by help of precipitation procedures that are mostly done <em>In Situ. </em>Those components can be recovered using the saponification process. Then these are examined under UV light spectroscopy. Now, the existence and extent of carotenoids can be determined by checking the levels of anti-oxidants.

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3 years ago
Geologists use the decay of potassium-40 in volcanic rocks to determine their age. Potassium-40 has a half-life of 1.26 109 year
melomori [17]

Answer:

m_{o} \approx 3.247\times 10^{-7}\,g

Explanation:

The mass of radioactive isotope at a certain time is given by the following expression:

m(t) = m_{o}\cdot e^{-\frac{t}{\tau} }

Time constant can be calculed in terms of half-life:

\tau = \frac{t_{1/2}}{\ln 2}

\tau = \frac{1.26\times 10^{9}\,yr}{\ln 2}

\tau = 1.818\times 10^{9}\,yr

The initial mass is:

m_{o} = \frac{2.73\times 10^{-7}\,g}{e^{-\frac{3.15\times 10^{8}\,yr}{1.818\times 10^{9}\,yr} }}

m_{o} \approx 3.247\times 10^{-7}\,g

8 0
3 years ago
Explain the term 'end point'?<br> What do you mean by a 1.0 M solution?
andrey2020 [161]

Answer:

According to me end point is the end of a reaction

4 0
2 years ago
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Joe the scientist wants to figure out the angle for throwing a football that
Solnce55 [7]

Answer:

C

Explanation:

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3 years ago
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The Great Burdock plant’s seeds have spines on them that attach to the fur of animals that brush against it. The seed then trave
Sphinxa [80]
The answer is B. Commensalism.

<span>Commensalism is a relationship between two organisms in which only one of them has benefit, and the other one is not affected. In this example, the Great Burdock's plants spread their seeds using animals, so they benefit from this relationship. On the other hand, animals neither have benefits not are harmed from the relationship.</span>
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3 years ago
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