All chemical reactions are chemical changes. The Law of Conservation of Matter states that matter cannot be created or destroyed. In a physical change, substances can change form, but the total mass remains the same. In a chemical change, the total mass of the reactants always equals the total mass of the products.
Rubber is an insulator that doesn't allow electricity to flow freely through it.
1 atm=7.15/9.25
Volume increase comes from reduced pressure
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right now we are using energy by online learning on our laptops , air conditioning, and transportation
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