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yuradex [85]
3 years ago
11

Why aren't descriptive investigations repeatable?

Chemistry
2 answers:
Bad White [126]3 years ago
8 0
In descriptive investigations, we still haven't formed any hypothesis yet so we seek information by asking question.

It's not repeatable because repeating the questions over and over again without any clue about what we want to seek is completely waste of time.

Hope this helps xox :)
Goryan [66]3 years ago
3 0

Answer:

Descriptive investigations are not repeatable because they are based only on observations made at a single point in time. The results may vary at a different time. In addition, descriptive investigations do not contain variables that may indicate cause-and-effect relationships.

Explanation:

I just did it and that was the given answer

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What are the elements of scientific method?​
Digiron [165]

Answer:

The basic steps of the scientific method are: 1) make an observation that describes a problem, 2) create a hypothesis, 3) test the hypothesis, and 4) draw conclusions and refine the hypothesis.

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2. A copper wire can conduct electricity whether the wire is
Stells [14]

Answer:

Intensive

Explanation:

The electrical conductivity of a wire depends on its composition, not the length of the wire.

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7 0
2 years ago
Why did the plates began to slip against each other 30 million years ago forming San Andreas fault
Jlenok [28]

The currents of the mantle pull the crust above it through drag. The plates, therefore, move on top of the mantle. At San Andreas fault, the North American Plate met the Pacific plate. However, due to the presence of the  Farallon plate that was disappearing into the mantle in a subduction zone, the Pacific and North American plates movements changed in their configuration. The two plates now move past each other. The San Andreas fault is, therefore, a strike-slip fault.

6 0
3 years ago
Someone please help asap
Naya [18.7K]
The answer would look something like this. (sorry for the ugliest diagram ever.)

4 0
3 years ago
A flash distillation chamber operating at 101.3 kpa is separating an ethanol water mixture the feed mixture contains z weight et
Alex73 [517]

Answer:

The answer is [\frac{LX_1}{46} + \frac{L(1-x)}{18}]\times0.454 mol/hr

[\frac{Vy_1}{46}+\frac{V(1-y)}{18}]\times0.454mol/hr

Explanation:

For flash distillation

F = V+L

\frac{V}{F} + \frac{L}{F} = 1

\frac{F}{V} -\frac{L}{V} = 1

Fz = Vy+Lx

Y = \frac{F}{V}\times Z - \frac{L}{V}\times X                  let, \frac{V}{F} = F

y = \frac{Z}{F} -[ \frac{1}{F} -1]\times X

Highlighted reading

F = 299;  \frac{V}{F} = 0.85 ; z = 0.36

y = \frac{0.36}{0.85} - (-0.15)\times X

 = 0.423 + 0.15x ------------(i)

y^{*} = -43.99713x^{6} + 148.27274x^{5} - 195.46x^{4}+127.99x^{3}-43.3x^{2}+ 7.469x^{}+ 0.02011

At equilibrium, y^{*} = y

0.423+0.15x^{} = y^{*}

-43.99713x^{6}+ 148.27274x^{5} - 195.46x^{4}+127.99x^{3}-43.3x^{2}+ 7.319x^{}-0.403

F(x) for Newton's Law

Let x_{0} = 0

     x_{1}     = \frac{0-[{-0.403}]}{7.319}

             = 0.055

     x_{2}      = \frac{{0.055}-{f(0.055)} {{{{{{{}}}}}}}}{f^{'} (0.055)}

             = \frac{{(0.055)}-(-0.11)}{3.59}

             = 0.085

    x^{3}    = \frac{{0.085}-(0.024)}{2.289}

           = 0.095

   x^{4}     = \frac{{0.095}-(-0.0353)}{-1.410}

            = 0.07

From This x and y are found from equation (i) and L and V are obtained from \frac{V}{F}  and F values

[\frac{LX_1}{46} + \frac{L(1-x)}{18}]\times0.454 mol/hr

[\frac{Vy_1}{46}+\frac{V(1-y)}{18}]\times0.454mol/hr

   

8 0
3 years ago
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