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Alina [70]
3 years ago
9

Which era does the Second industrial revolution fall

Advanced Placement (AP)
1 answer:
stich3 [128]3 years ago
5 0
Historians have labeled the years from 1870-1914 as the period of the Second Industrial Revolution. While the First Industrial Revolution caused the growth of industries, such as coal, iron, railroads and textiles, the Second Industrial Revolution witnessed the expansion of electricity, petroleum and steel.
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AP CALC QUESTION!! WILL MARK BRAINLIEST (TWO QUESTIONS)
kodGreya [7K]

1. Using washers, the volume is given by the integral

\displaystyle\pi\int_1^{e^2}((2+2)^2-(\ln x+2)^2)\,\mathrm dx

=\boxed{\displaystyle\pi\int_1^{e^2}(20+4\ln x-(\ln x)^2)\,\mathrm dx}

We're using washers whose centers depend on the value of x, hence we integrate with respect to

2. The area of the given region is given by the integral

\displaystyle\int_0^2\sin^{-1}\frac x2\,\mathrm dx

To compute the integral, first consider the substitution u=\frac x2, or 2u=x so that 2\,\mathrm du=\mathrm dx. Then x\to0\implies u\to0 and x\to2\implies u\to1, so the integral is equivalently

\displaystyle2\int_0^1\sin^{-1}u\,\mathrm du

Integrate by parts, taking

f=\sin^{-1}u\implies\mathrm df=\dfrac{\mathrm du}{\sqrt{1-u^2}}

\mathrm dg=\mathrm du\implies g=u

so that

\displaystyle2\int_0^1\sin^{-1}u\,\mathrm du=2\left(u\sin^{-1}u\bigg|_0^1-\int_0^1\frac u{\sqrt{1-u^2}}\,\mathrm du\right)

\sin^{-1}0=0 and \sin^{-1}1=\frac\pi2, so the area is

\displaystyle\pi-2\int_0^1\frac u{\sqrt{1-u^2}}\,\mathrm du

For the remaining integral, substitute w=1-u^2, so that \mathrm dw=-2u\,\mathrm du. Then u\to0\implies w\to1 and u\to1\implies w\to0:

\displaystyle\pi-\int_0^1\frac{\mathrm dw}{\sqrt w}

(notice that the integral is improper)

\displaystyle\pi-\lim_{t\to0^+}2\sqrt w\bigg|_t^1

\displaystyle\pi-2\left(1-\lim_{t\to0^+}\sqrt t\right)=\boxed{\pi-2}

8 0
3 years ago
Which job would not be best suited for an extroverted person?
Sloan [31]

Answer:

All job are equal.

but you ask.

the answer is labourer

but labour also important for making house.

8 0
3 years ago
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People have had both positive and negative reactions to Angela's Ashes. Why do you think people have reacted so strongly to McCo
Sophie [7]

Answer:

Because his memories present very strong and impacting concepts, but controversial at the same time.

Explanation:

Angela's Ashes is a book that tells the memories of McCourt during his childhood and adolescence. His memories depict very strong and uncomfortable situations to be experienced, such as negligent parents, depression, alcoholism, extreme poverty, exploitation, sexual experiences, poor self-esteem, among others.

The experiences lived by McCourt are not comfortable to be read. Some people think that this is a positive point of the book's narrative, because it shows how dirty and uncomfortable human life is. However, many people criticize this type of narrative, because they claim that it is exaggerated and that it suffers from suffering. In addition, many people, like McCourt's mother, claim that these memories are false and fanciful, which increases the discrepancy of opinion among readers.

5 0
3 years ago
Read this passage from an article about the job of a circus ringmaster.
Nikolay [14]

Answer:

C. It's the ringmasters job to hold the show together. if something hour goes wrong they try there best to stall for time.

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3 years ago
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Which general area of policy is generally left up to the central government
stealth61 [152]
The answer is A) Health :)
6 0
4 years ago
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