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mart [117]
3 years ago
12

How does the sun rise and set on the spring and fall equinox

Chemistry
1 answer:
Tom [10]3 years ago
8 0

Answer:

Actually, the Sun only rises due east and sets due west on 2 days of the year  the spring and fall equinoxes! On other days, the Sun rises either north or south of "due east" and sets north or south of "due west." ... At the fall equinox, the Sun rises due east and sets due west.

Explanation:

Sunrise and Sunset - Stanford Solar Center

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How much energy is released by the decay of 3 grams of 20Th in the following reaction 230 Th - 226Ra + 'He (230 Th = 229.9837 g/
wolverine [178]

Answer : The energy released by the decay of 3 grams of 'Th' is 2.728\times 10^{-15}J

Explanation :

First we have to calculate the mass defect (\Delta m).

The balanced reaction is,

^{230}Th\rightarrow ^{226}Ra+^{4}He

Mass defect = Sum of mass of product - sum of mass of reactants

\Delta m=(\text{Mass of Ra}+\text{Mass of He})-(\text{Mass of Th})

\Delta m=(225.9771+4.008)-(229.9837)=1.4\times 10^{-3}amu=2.324\times 10^{-30}kg

conversion used : (1amu=1.66\times 10^{-27}kg)

Now we have to calculate the energy released.

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Energy=2.0916\times 10^{-13}J

The energy released is 2.0916\times 10^{-13}J

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As, 230 grams of Th release energy = 2.0916\times 10^{-13}J

So, 3 grams of Th release energy = \frac{3}{230}\times 2.0916\times 10^{-13}J=2.728\times 10^{-15}J

Therefore, the energy released by the decay of 3 grams of 'Th' is 2.728\times 10^{-15}J

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In one scene in the movie The Godfather II,
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irina [24]

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