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Igoryamba
2 years ago
5

suppose a log's mass is 5 kg. After burning, the mass of the ash is 1 kg. explain what May have happened to the other 4 kg.

Physics
1 answer:
alexdok [17]2 years ago
7 0
We know that the mass of the log before burning is 5 kg. After it is burnt, the mass of the ash comes out to be 1 kg. So there is a definite mismatch of 4 kg. When the log is burnt, there is the formation of smoke. The air and water present in the wood vaporises to reduce the weight significantly. The combustion actually leads to the formation of carbon dioxide that mixes with the air and also water. The extra mass thus goes into the formation of carbon dioxide and water.



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Answer:

\theta=39.49^{\circ}

Explanation:

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We need to find the angle with which the pumpkin is fired. the maximum height of the projectile is given by :

H_{max}=\dfrac{v^2\ sin^2\theta}{2g}

On rearranging the above equation, to find the angle as :

\theta=sin^{-1}(\dfrac{\sqrt{2gH_{max}}}{v})

\theta=sin^{-1}(\dfrac{\sqrt{2\times 9.8\times 9.99}}{22})

\theta=39.49^{\circ}

So, the angle with which the pumpkin is fired is 39.49 degrees. Hence, this is the required solution.

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2 years ago
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Answer:

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2 years ago
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Alekssandra [29.7K]
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I hope my answer has come to your help. Thank you for posting your question here in Brainly. We hope to answer more of your questions and inquiries soon. Have a nice day ahead!
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