To break a strip of aluminum metal. Ms. Cristell bent an aluminum strip back and forth many times. She touched the metal and noticed the aluminum was getting warm where she was bending it What type of energy transformation occurs when the metal is bent back and forth? Heat energy to mechanical energy Radiant energy to heat energy Chemical energy to heat energy

The last one

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I am pretty sure but I will delete if it is wrong

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the atomic number of carbon is six, which means that a carbon atom has six protons. carbon has three naturally occurring isotopes: carbon-12, carbon-13, and carbon-14. which of these statements are true about carbon and its isotopes? select all that appl