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3 years ago

I been having a problem with this question can you please help??

Physics

1 answer:

Klio2033 [76]3 years ago

4 0

Answer:

(D) Water is denser than oil but less than syrup.

Explanation:

Given:

A picture of a jar containing three liquids.

The position of the syrup is at the bottom of the jar. The position of water is in middle and the oil is at the top.

We know that, the oil is the lightest in density when compared to syrup and water. So, it is at the top.

Now, since water is in the middle of the two, it means that density of water is greater than that of oil but less dense than that of syrup.

So, the density of the syrup is the greatest. Hence, it sits at the bottom.

Therefore, the best explanation is that water being less dense than syrup but more dense than oil, will be in the middle of two.

This explains the position of all the three liquids. Water is in the middle, oil at top and syrup at bottom.

So, the last option is correct.

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3 years ago

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Answer:

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3 years ago

A diffraction grating with 140 slits per centimeter is used to measure the wavelengths emitted by hydrogen gas. At what angles i

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Answer:

0.003181 radians

0.003005 radians

Explanation:

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$d=\frac{0.01}{140} =7.14\times 10^{-5}\ m$

Now,

$dsin\theta = m\lambda\\\Rightarrow \theta=sin^{-1}\left(\frac{m\lambda}{d}\right)\\\Rightarrow \theta=sin^{-1}\left(\frac{3\times 434\times 10^{-9}}{7.14\times 10^{-5}}\right)\\\Rightarrow \theta=sin^{-1}0.018228\\\Rightarrow \theta=0.01823^{\circ}=0.01823\times \frac{\pi}{180}=0.003181 radians$

0.003181 radians

When λ = 410 nm = 410×10⁻⁹ m

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0.003005 radians

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3 years ago

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3 years ago

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Answer:

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3 years ago