Copper, a metal known since ancient times, exists in two stable isotopic forms, 6329Cu (69.09%) and 6529Cu (30.91%). Their atomic masses are 62.93 amu and 64.9278 amu respectively. Calculate the average atomic mass of copper.
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Assume you are an investigating officer who has entered a scene after a
robbery. You observe the thief has broken a tinted window pane before he/she
left. There are tiny particles of glass found. Some of these are found at thescene of the crime and some are caught in the suspected thief’s clothing. If
you and your team can prove these particles are identical, you have a strong
case.
Design a scientific way to prove that the glass pieces from the scene of crime
and the thief’s match. (HINT: Laws of Refraction)
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The mean temperature for the first 4 days in January was 8°C. The mean temperature for the first 5 days in January was 6°C. What was the temperature on the 5th day?
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