3 years ago

What is dark energy?

1 answer:

5 0

Dark energy is what is causing the accelerating expansion of the universe. It can also be defined as the theoretical energy that counteracts or acts against gravity. Others also define it as a theoretical, new kind of dynamic energy field that fills space, but whose energy has an effect opposite to that of normal energy.

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miv72 [106K]

Answer:

Linear motion in which the direction of the velocity remains constant and the path is a straight line.

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2 years ago

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Virtual image formed by concave mirror<br>

Elis [28]

Answer:

yes

Explanation:

because it is a diverging mirror

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3 years ago

The gas sample has a volume of 45.1 μL at 24.7 °C. What is the volume of the gas after the sample is heated to 37.2 °C at consta

likoan [24]

Answer:

V₂ = 46.99 μL.

Explanation:

Given that

V₁ = 45.1 μL

T₁ = 24.7°C = 273 + 24.7 = 297.7 K

T₂ = 37.2°C = 273+37.2=310.2 K

Lets take ,The final volume = V₂

We know that ,the ideal gas equation

If the pressure of the gas is constant ,then we can say that

$\dfrac{V_2}{V_1}=\dfrac{T_2}{T_1}$

${V_2}=V_1\times \dfrac{T_2}{T_1}$

Now by putting the values in the above equation we get

${V_2}=45.1\times \dfrac{310.2}{297.7}\ \mu \ L$

V₂ = 46.99 μL.

The final volume will be 46.99 μL.

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3 years ago

Yellow-green light has a wavelength of 560 nm. What is its frequency?

Natasha2012 [34]

5.4 x 1014Hz
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