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2 years ago

1. What would happen to the current model of the atom if new information about its structure is discovered in the future?

Chemistry

1 answer:

Semenov [28]2 years ago

6 0

1-Option A. Current model will be revised.
2-Option D. Nucleus
3-<span>Option B. </span>Counting the no. of protons.

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In the picture this is my last question pls.

Genrish500 [490]

Answer:

Chromosomes and I think its too many

Explanation:

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2 years ago

(worth 10pts!!!!!!) What did Dmitri Mendeleev contribute to science? A. He arranged the first periodic table. B. He developed th

vesna_86 [32]

Answer:

A. He arranged the first periodic table.

Explanation:

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2 years ago

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Which best describes the geologic time scale? (choose the best answer from below)

Evgen [1.6K]

Answer: B) It presents the correct sequence of events in Earth’s history.

Explanation: edge 2021

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2 years ago

Water is poured into a conical container at the rate of 10 cm3/sec. The cone points directly down, and it has a height of 20 cm

8090 [49]

Answer:

\frac{dh}{dt}_{h=2cm} =\frac{40}{9\pi}\frac{cm}{2}

Explanation:

Hello,

The suitable differential equation for this case is:

$\frac{dV}{dt}=10\frac{cm^3}{s}$

As we're looking for the change in height with respect to the time, we need a relationship to achieve such as:

$\frac{dh}{dt} = ?*\frac{dV}{dt}$

Of course, $?=\frac{dh}{dV}$ .

Now, since the volume of a cone is $V=\pi r^2h/3$ and the ratio $r/h=15/20=3/4$ or $r=3/4h$ , the volume becomes:

$V=\pi (\frac{3}{4} h)^2h/3= \frac{3}{16}\pi h^3$

We proceed to its differentiation:

$\frac{dV}{dh} =\frac{9}{16} \pi h^2\\\frac{dh}{dV} =\frac{16}{9 \pi h^2}$

Then, we compute $\frac{dh}{dt}$

$\frac{dh}{dt} = \frac{16}{9 \pi h^2}*\frac{dV}{dt}\\\frac{dh}{dt} = \frac{16}{9\pi h^2}*10\frac{cm^3}{s} =\frac{160}{9 \pi h^2}$

Finally, at h=2:

$\frac{dh}{dt}_{h=2cm} =\frac{160}{9\pi 2^2}\\\frac{dh}{dt}_{h=2cm} =\frac{40}{9\pi}\frac{cm}{s}$

Best regards.

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3 years ago

The use of genetics by farmers to produce more abundant and healthier crops is an application of the science of _____.

Klio2033 [76]

<h3>Question :</h3>

The use of genetics by farmers to produce more abundant and healthier crops is an application of the science of _____.

DNA profiling

biotechnology

molecular biology

nuclear genetics

<h3>Answer :</h3>

The use of genetics by farmers to produce more abundant and healthier crops is an application of the science of <u>biotechnology</u>.

So correct option is 2nd biotechnology.

<h3>Explanation :</h3>

Biotechnology is the use of biological structures and processes for useful industrial purposes, whether product or function.

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2 years ago

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