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Understanding Power Calculation and Hafnium's Applications

Learn how to calculate power using the formula P = W/t, define Hafnium's properties, and its uses in plasma torches for steel cutting. Finish laboratory work for tonight and prepare for Chapter 8 quiz on Friday.

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Understanding Power Calculation and Hafnium's Applications

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  1. Warm up 5/01/13 • Question: If 100 J of work are done in 4 seconds, what is the power? • Answer: • P = W/t • 100 J / 4 S = 25 watts • Goal: I will calculate my own power.

  2. Element of the day • 72 – Hafnium – Hf • Hafnium has a high melting point and is extremely resistant to corrosion even at high temperatures, so it is perfect for plasma torches, which are used to cut through steel.

  3. Horsepower Lab • Tonight’s HW • Finish Lab • Ch 8 Quiz Friday • Crossword Agenda / HW

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