3 years ago

What is the only country in africa with an extensive area of mountainous topography?

Geography

1 answer:

alukav5142 [94]3 years ago

6 0

The country is Ethiopia

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If all the energy from a 103 W light bulb is emitted at 590.0 nm, what is the energy of each photon in Joule? Planck’s constant

sergejj [24]

Answer:

Energy of each photon is given by $0.0335\times 10^{-17}j$

Explanation:

We have given wavelength of light $\lambda =590nm=590\times 10^{-9}m$

Speed of light $c=3\times 10^8m/sec$

Plank's constant $h=6.6\times 10^{-34}j-s$

We know that energy of photon is given by $E=h\nu =\frac{hc}{\lambda }$

So energy is given by

$E=h\nu =\frac{hc}{\lambda }=\frac{6.6\times 10^{-34}\times 3\times 10^8}{590\times 10^{-9}}=0.0335\times 10^{-17}j$

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2 years ago

Why does Germany feel undefeated?

motikmotik

Answer:

Even though they lost World War 1 and World War 2, they still think that they can still win all the other counties over, bombs and technology are always getting better everyday. (NOT TO BE RACIST OR ANYTHING)

Explanation:

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2 years ago

Wegener was intrigued when the same Mesosaurus fossils, an ancient freshwater reptile, showed up on different continents.

mrs_skeptik [129]

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Since neither reptile could have swum great distances across salt water he inferred that they once lived on a single landmass that has since split apart.

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2 years ago

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Which is NOT an important line of LATITUDE?

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d)International Date Line

The international Date Line is a longitude line.

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2 years ago

Agriculture has used selective

PIT_PIT [208]

The answer should be B

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3 years ago