### What is its height of the tower on a hot day

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Q1. A 1500 W hair dryer is operated on a 160 V circuit for 5 minutes every day. If electricity costs \$0.15/kWh:

a) what is the cost of operating the blow dryer for one day?

b) What is the cost of using the blow dryer for one year (365 days)?

Q2. An iron tower in is 399 meters tall on a cold day (T = -6.7 degrees Celsius). What is its height of the tower on a hot day while the temperature is 31.5 degrees Celsius?

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