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storchak [24]
3 years ago
10

Diffusion and Solubility of Gases (B. Flaconn'eche, et al., Oil and Gas Science and Technology, 2001:262-278) reported on a stud

y of the effect of temperature and other factors on gas transport coefficients in semi crystalline polymers. The permeability coefficient (in 10-6 cm3 (STP)/cm. s. MPa) of CO2 was measured for extruded medium density polyethylene at both 60 degree C and 61 degree C. The results are as follows:
60⁰ C54516167576960606362
61⁰ C58606666686160

(1) Find Mean of 60 degree sample to nearest 0.1
(2) Find mean of 61 degree sample to nearest 0.1
(3) Find sample standard deviation of 60 degree sample to nearest 0.01
(4) Find Sample standard deviation of 61 degree sample to nearest 0.01
(5) What are the degrees of freedom?
(6) Center of Confidence interval? (7) Width of confidence interval (remember to multiply by 2?)
(8) If everything was the same except that we had one more sample in each group, would the above confidence interval get longer or shorter or stay the same?
Mathematics
1 answer:
yarga [219]3 years ago
5 0

Answer:

Step-by-step explanation:

see the attached file for the working and the answers, enjoy!

Download docx
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jolli1 [7]

Answer:

Acceleration equals zero because of constant velocity

f - fr = ma \\ 70 \cos(30)  - fr = 0 \\ 70 \cos(30)  = fr \\  fr \: = 60.62

coefficient

Fr = coefficient × r

60.62= ce ×100

0.60 = coefficient

6 0
3 years ago
You will write a procedural page explaining how to find the volume of a prism. This must be done in complete sentences and using
Alex777 [14]
The formula for the volume of a prism is V=Bh, where B is the base area and h is the height.The base of the prism is a rectangle.The length of a rectangle is 9cm and the width is 7cm.
3 0
3 years ago
Read 2 more answers
Robert is 10 years older than her brother. In 2 years, Robert will be three times as old as his brother. How old are they now?
valentina_108 [34]
Robert is 13 and his brother is 3 y.o.
X... brother’s age
X+10... Robert’s age
X+10+2... Robert’s age in 2 years
X+2...Brother’s age in 2 years
X+10+2/x+2=3
X=3
X+10=13
6 0
3 years ago
Negative 4,200 divided by 300
Pachacha [2.7K]

Answer:

-14

Step-by-step explanation:

5 0
2 years ago
Evaluate the following limit:
Makovka662 [10]

If we evaluate the function at infinity, we can immediately see that:

        \large\displaystyle\text{$\begin{gathered}\sf \bf{\displaystyle L = \lim_{x \to \infty}{\frac{(x^2 + 1)^2 - 3x^2 + 3}{x^3 - 5}} = \frac{\infty}{\infty}} \end{gathered}$}

Therefore, we must perform an algebraic manipulation in order to get rid of the indeterminacy.

We can solve this limit in two ways.

<h3>Way 1:</h3>

By comparison of infinities:

We first expand the binomial squared, so we get

                         \large\displaystyle\text{$\begin{gathered}\sf \displaystyle L = \lim_{x \to \infty}{\frac{x^4 - x^2 + 4}{x^3 - 5}} = \infty \end{gathered}$}

Note that in the numerator we get x⁴ while in the denominator we get x³ as the highest degree terms. Therefore, the degree of the numerator is greater and the limit will be \infty. Recall that when the degree of the numerator is greater, then the limit is \infty if the terms of greater degree have the same sign.

<h3>Way 2</h3>

Dividing numerator and denominator by the term of highest degree:

                            \large\displaystyle\text{$\begin{gathered}\sf L  = \lim_{x \to \infty}\frac{x^{4}-x^{2} +4  }{x^{3}-5  }  \end{gathered}$}\\

                                \ \  = \lim_{x \to \infty\frac{\frac{x^{4}  }{x^{4} }-\frac{x^{2} }{x^{4}}+\frac{4}{x^{4} }    }{\frac{x^{3} }{x^{4}}-\frac{5}{x^{4}}   }  }

                                \large\displaystyle\text{$\begin{gathered}\sf \bf{=\lim_{x \to \infty}\frac{1-\frac{1}{x^{2} } +\frac{4}{x^{4} }  }{\frac{1}{x}-\frac{5}{x^{4} }  }  \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ =\frac{1}{0}=\infty } \end{gathered}$}

Note that, in general, 1/0 is an indeterminate form. However, we are computing a limit when x →∞, and both the numerator and denominator are positive as x grows, so we can conclude that the limit will be ∞.

5 0
2 years ago
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