2 years ago

Which structure regulates water loss and gas exchange

1 answer:

8 0

If you're referring to plants, your answer is the Epidermis.

Hope this helps! :)

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ivanzaharov [21]

Answer:

Explanation:

an element contains only one kind of particle

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2 years ago

IRINA_888 [86]

A) LiAlH4 b) Ph(3)SnH c)Na in dry ether(Wurtz reaction)

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2 years ago

frutty [35]

An old penny rusting, remember you can’t undo a chemical change

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2 years ago

Serhud [2]

Explanation:

Given that,

The frequency of electromagnetic spectrum is $2.73\times 10^{16}\ Hz$

(A) Let the wavelength of this radiation is $\lambda$ . We know that,

$c=f\lambda\\\\\lambda=\dfrac{c}{f}\\\\\lambda=\dfrac{3\times 10^8}{2.73\times 10^{16}}\\\\\lambda=1.09\times 10^{-8}\ m$

So, the wavelength of this radiation is $1.09\times 10^{-8}\ m$ .

(B) Let E is the energy associated with this radiation. Energy of an electromagnetic radiation is given by :

$E=hf$

h is Planck's constant

$E=6.63\times 10^{-34}\times 2.73\times 10^{16}\\\\E=1.8\times 10^{-17}\ J$

1 kcal = 4184 J

It means,

$1.8\times 10^{-17}\ J=\dfrac{1}{4184}\times 1.8\times 10^{-17}\\\\=4.3\times 10^{-21}\ \text{kcal}$

Hence, this is the required solution.

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3 years ago

Tanzania [10]

Element. Everything is else is a mixture, therefore not pure.

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3 years ago