BRAINLYEST IF CORRECT! 2 QUESTIONS. HELP FAST PLEASE!!

Biology

1 answer:

Slav-nsk [51]3 years ago

7 0

Q5.

The answer is A. In thermodynamics, the first law of conservation states that energy can never be destroyed or created but can only be transformed from one form to another. Therefore part of the electric energy was converted to light energy while the other dissipated as heat. However, the summation of the energy of these tow outputs in joules remains the same as initial electric energy.

The answer is B. This is because the water in the dam is used to turn turbines hence this form of energy is mechanical energy. As the turbines turn, they turn electromagnets that convert the mechanical energy into electrical energy

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Where do most of the world's coal mines come from?

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Most of the world's coal mines come from China, India, the United States, the European Union, and Australia.

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China: In the year 2018, China alone produced approximately 3523 million tonnes of coal. Though China is the largest producer of coal in the world, it has to import coal from other countries to fulfill its energy needs. China's share in the total coal produced in the world in the last 12 years is 39.7%.
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The United States: The coal produced in the United States in the year 2018 was approximately 702 million tonnes. The last 12 year share of the coal produced in the US is 16.2% of the total coal produced all over the world.
The European Union: The countries that constitute the European Union togetherly produced approximately 490 million tonnes of coal in the year 2018. The last 12-year contribution of the EU to the total coal produced in the world is 9.2%.
Australia: The production of coal in Australia for the year 2018 was approximately 481 million tonnes. Australia alone produced 6.2% coal of the total world production of coal in the last 12 years.

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A neutral atom of helium has 2 protons and ______ electrons. How many electrons?

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2 to counteract the protons

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13. Which organelle is the site for the cellular process of photosynthesis?

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The Chloroplast is part of the photosynthesis.

Have a great day

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