Question

Please friends give an exact answer

Answer 1

Following are ur exact answers:
1.To decrease friction.
2.Because of the presence of free electrons.
3.They are formed by the organisms which were buried for thousands of years called fossils.

Hope it helps

Answer 2

Hey mate !!

Thanks for asking this question

Here is your answer

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• We use lubricants in machine to reduce friction so, that machine can work properly.

• Metals are good conductors of heat because metal ions are closly packed in metal lattice. and the availability of free electrons which transfer to heat easier making it good

• Coal and petroleum called fossil fuel because they are made up of dead animals

Hope it helps you ^_^

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