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2 years ago

What is the active element in most photovoltaic cells?.

Chemistry

2 answers:

jonny [76]2 years ago

3 0

Answer:

if you mutliply 8x2 it would be 16 and half of 16 is 8 and if you multiply that by 2 you get 16 again and then if you multiply that by 2 it comes out to 32 then devide that by 2 and you get 16 then divide again and you get 8

Explanation:

choli [55]2 years ago

3 0

Answer:

silicon is the most common semiconductor used in computer chips

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Pressure gauge at the top of a vertical oil well registers 140 bars. The oil well is 6000 m deep and filled with natural gas dow

andreyandreev [35.5K]

Explanation:

(a) The given data is as follows.

Pressure on top ( $P_{o}$ ) = 140 bar = $1.4 \times 10^{7} Pa$ (as 1 bar = $10^{5}$ )

Temperature = $15^{o}C$ = (15 + 273) K = 288 K

Density of gas = $\frac{PM}{ZRT}$

$\frac{dP}{dZ} = \rho \times g$

$\frac{dP}{dZ} = \int \frac{PM}{ZRT}$

$\int_{P_{o}}^{P_{1}} \frac{dP}{dZ} = \frac{Mg}{ZRT} \int_{0}^{4700} dZ$

$ln (\frac{P_{1}}{P_{o}}) = \frac{18.9 \times 10^{-3} \times 9.81 \times 4700 m}{0.80 \times 8.314 J/mol K \times 288 K}$

= 0.4548

$P_{1} = P_{o} \times e^{0.4548}$

= $1.4 \times 10^{7} Pa \times 1.5797$

= $2.206 \times 10^{7} Pa$

Hence, pressure at the natural gas-oil interface is $2.206 \times 10^{7} Pa$ .

(b) At the bottom of the tank,

$P_{2} = P_{1} + \rho \times g \times h$

= 2.206 \times 10^{7} Pa + 700 \times 9.81 \times (6000 - 4700)[/tex]

= $309.8 \times 10^{5} Pa$

= 309.8 bar

Hence, at the bottom of the well at $15^{o}C$ pressure is 309.8 bar.

6 0

3 years ago

In acid solution, water can add to the double bond of 2-butenedioic acid to form 2-hydroxysuccinic acid.

satela [25.4K]

So, what is the question?

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2 years ago

NEED HELP ASAP WILL GIVE BRAINLYEST Organisms that are made up of prokaryotic cells are NOT ____________. Multicellular All of t

Serhud [2]

Explanation:

the answer is that prokaryotic cells are not multicellular

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2 years ago

What is the difference between physical and chemical change?

Vikki [24]

There are several differences between a physical and chemical change in matter or substances. A physical change in a substance doesn't change what the substance is. In a chemical change where there is a chemical reaction, a new substance is formed and energy is either given off or absorbed.

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3 years ago

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A plant fertilizer contains 15% by mass nitrogen (N). In a container of soluble plant food, there are 12.2 oz of fertilizer. How

ale4655 [162]

51.86 grams would be in the container.

One ounce is an equivalent of 28.34 grams, so times that by 12.2
.
12.2 * 28.34 = 345.75.

Put the percentage into decimal form, so 15% would now be 0.15.

0.15 * 345.75 = 51.86.

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3 years ago

Read 2 more answers