15. 50 g of water at 20°C is mixed with 80 g of water at 60'C....

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15. 50 g of water at 20°C is mixed with 80 g of water at 60C. What is the mixtures final temperature? a. 44.6 °C b. 83.2 °C

18. What causes lightning? a static electricity b. solar activity C. earths magnetic field d. low atmospheric pressure A 12

Answer 1

Answer #1

16 A negatively charged body has 6 Lost proton & there fose it accquires eve charge on the body. Ans. » Lost proton.

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Answer 2

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