A resistor made of Nichrome wire is used in an application where its resistance cannot change more than 1.30% from its value at 20.0°C. Over what temperature range can it be used (in °C)?

Which object is most likely represented by a dot?

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Global warming will produce rising sea levels partly due to melting ice caps but also due to the expansion of water as average ocean temperatures rise. to get some idea of the size of this effect, calculate the change in length of a column of water 1.00 km high for a temperature increase of 1.00ºc. note that this calculation is only approximate because ocean warming is not uniform with depth. (answer in ×10^{-3} −3 m)