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o-na [289]
2 years ago
14

) A certain polymer is used for evacuation systems for aircraft. It is important that the polymer be resistant to the aging proc

ess. Twenty specimens of the polymer were used in an experiment. Ten were assigned randomly to be exposed to an accelerated batch aging process that involved exposure to high temperatures for 10 days. Measurements of tensile strength of the specimens were made, and the following data were recorded on tensile strength in psi:
No aging: 227, 222, 218, 217, 225, 218, 216, 229, 228, 221
Aging: 219, 214, 215, 211, 209, 218, 203, 204, 201, 205

(a) Do a dot plot of the data.
(b) From your plot, does it appear as if the aging process has had an effect on the tensile strength of this polymer? Explain.
(c) Calculate the sample mean tensile strength of the two samples.
(d) Calculate the median for both. Discuss the similarity or lack of similarity between the mean and median of each group.
(e) Calculate the sample variance as well as standard deviation in tensile strength for both samples.
(f) Does there appear to be any evidence that aging affects the variability in tensile strength?
Engineering
1 answer:
bonufazy [111]2 years ago
5 0

Answer:

it will be a scattered plot

Explanation:

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WITCHER [35]

Answer:

Q = 0.00017597 m3/sec

Explanation:

given data:

temperature of water 15.6 degree celcius

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dynamix viscosity of water = .0011193 kg/m sec at 15.6 degree celcius

density of water at 15.6 degree = 999.07 kg/m3

for laminar flow REYNOLD NUMBER < 2000

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Reynold number Re = \frac{\rho vd}{\mu}

v = \frac{Re \mu}{\rho d}v = \frac{2000*0.00011193}{999.07 *0.1}

v = 0.022406 m/sec

Q =\frac{\pi}{4} d^2 v

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7 0
3 years ago
Assume that light of wavelength 6000A is coming from a star. What is the limit of resolution of a telescope whose objective has
Paul [167]

Answer:

θ=0.0288 radian

Explanation:

resolution limit is the minimum angular separation of  two sources that can be viewed  distinctly    by telescope

\theta =\frac{1.22\times \lambda}{D}

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θ=0.0288 radian

4 0
3 years ago
An intersection had 13 crashes last year. The 4 legs of the intersection had 2-way ADT values of 9671, 2893, 9506, and 2611 vehi
VLD [36.1K]

Answer:

527

Explanation:

Data provided in the question:

Number of crashes per year at the intersection = 13

The 4 legs of the intersection had 2-way ADT values :

9671, 2893, 9506 and 2611 vehicles last year.

Now,

ADT = 9671 + 2893 + 9506 + 2611

= 24,681 vehicles

Rate per Million Entering Vehicles, (RMEV )

= [ ( crashes per year ) ÷ ( Approach ADT per year ) ] × 10⁶

or

RMEV = [ ( 13 ) ÷ (24,681) ] × 10⁶3

or

RMEV = 526.721 ≈ 527

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Lina20 [59]

Answer:

you died

Explanation:

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Answer:

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