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tekilochka [14]

3 years ago

15

What property of water is the most important for life

Advanced Placement (AP)

1 answer:

earnstyle [38]3 years ago

8 0

Its attraction to polar molecules

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Study the political cartoon.

lara [203]

Answer: Temperance

Explanation:

In the 19th century, the Temperance movement gained a lot of steam in the United States and culminated with the Prohibition of Alcohol from 1920 to 1933.

The Temperance movement was founded by those who believed that alcohol was killing nations as people became intoxicated and got into all manner of social ills as well as it having negative effects on their social, professional and family lives.

The picture described above is trying to link alcohol to evil with the black flag and the snake around the cup meant to symbolize that. The people falling are intoxicated and the woman crying is meant to show the negative effects alcohol had on families.

3 0

2 years ago

Surface Area of a can is 517.8 cm^2. Maximize the volume of this can using the measured surface area.

mafiozo [28]

Answer:

$r = 5.24$ --- Radius

$h = 10.48$ --- Height

Explanation:

Given

Object: Can (Cylinder)

$Surface\ Area = 517.8cm^2$

Required

Maximize the volume

The surface area is:

$S.A = 2\pi r^2 + 2\pi rh$

Substitute 517.8 for S.A

$517.8 = 2\pi r^2 + 2\pi rh$

Divide through by 2

$258.9 = \pi r^2 + \pi rh$

Factorize:

$258.9 = \pi r(r + h)$

Divide through by $\pi r$

$\frac{258.9}{\pi r} = r + h$

Make h the subject

$h = \frac{258.9}{\pi r} - r$ --- (1)

Volume (V) is calculated as:

$V = \pi r^2h$

Substitute (1) for h

$V = \pi r^2(\frac{258.9}{\pi r} - r)$

Open Bracket

$V = 258.9r - \pi r^3$

Differentiate V

$V' = 258.9 - 3\pi r^2$

Set V' to 0

$0 = 258.9 - 3\pi r^2$

Collect Like Terms

$3\pi r^2 = 258.9$

Divide through by 3

$\pi r^2 = 86.3$

Divide through by $\pi$

$r^2 = \frac{86.3}{\pi}$

$r^2 = \frac{86.3*7}{22}$

$r^2 = \frac{604.1}{22}$

Take square root of both sides

$r = \sqrt{\frac{604.1}{22}$

$r = 5.24$

Recall that:

$h = \frac{258.9}{\pi r} - r$

Substitute 5.24 for r

$h = \frac{258.9}{\pi * 5.24} - 5.24$

$h = \frac{258.9*7}{22 * 5.24} - 5.24$

$h = \frac{1812.3}{115.28} - 5.24$

$h = 15.72 - 5.24$

$h = 10.48$

Hence, the dimension that maximize the volume is:

$r = 5.24$ --- Radius

$h = 10.48$ --- Height

7 0

3 years ago

When grafting, the____ that has been cut from one plant is attached to the rootstock of another plant.

Degger [83]

Answer:

The bud

Explanation:

7 0

3 years ago

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Suppose you roll a regular 6-sided die with the numbers 1 through 6. What is the probability that you roll a 3 and then rolla 47

Gekata [30.6K]

Answer:

3/47

Explanation:

I think

6 0

3 years ago

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100 points if you answer correctly!

vitfil [10]

Explanation:

orbital launch vehicles

7 0

2 years ago

Read 2 more answers