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Temka [501]
3 years ago
9

One g of U-235 produces approximately how much more energy than 1 g of coal? (a) 3,000 times, (b) 19,000 times, (c) 80,000 times

,(d) 400,000 times, (e) 2,000,000 times.
Chemistry
1 answer:
Artist 52 [7]3 years ago
3 0

2,000,000 times

Explanation:

One gram of U-235 produces approximately 2,000,000 times more energy than one gram of coal.

The energy in 1g of U-235 is a nuclear energy whereas energy obtained from coal is chemical energy by combustion. During combustion chemical bonds are broken between the carbon atoms.

  • Uranium decays the radioactive fission.
  • When it is bombarded with particles, an artificial disintegration is induced.
  • Most nuclear reactions are chain reactions in which one step leads to another until stability is produced.
  • Each step produces energy for the next process.

Learn more:

Non-renewable resource brainly.com/question/2948717

#learnwithBrainly

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Does density of water depend on the amount of water present ?
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How you could use the scientific method to learn whether water really does take longer to boil if you are watching it.​
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Answer:

Please find the detailed explanation below

Explanation:

A scientific method is a sequence of steps that is used to solve a problem. Every scientific method begins with a problem that needs to be solved.

Hence, in order to determine whether water really does take longer to boil if you are watching it, we employ the steps involved in a scientific method.

1) Ask a question/Make observation: This must initiate the process. The observation/question made here is that DOES WATER TAKE LONGER TIME TO BOIL WHEN WATCHED?

2. Formulating hypothesis; an hypothesis is a testable prediction of a possible solution to the stated problem. In this case, an hypothesis could read: IF water is watched while boiling, THEN it will take a longer time to boil. A hypothesis must be tested for it to be proved or disproved.

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The independent variable (manipulated variable) will be the WATCHING, while the dependent variable (tested/responding variable) will be the TIME IT TAKES FOR WATER TO BOIL

4. Analyse the data; the data refers to the recorded time for each group of water. This will be analysed and compared.

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Therefore, via the scientific method, it can be determined if it really takes longer time for water to boil while watched.

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