Traditionally, frying pans were made of cast iron. Although cast iron is still popular today, especially for outdoor cooking, most frying pans are now made from metals such as aluminium or stainless steel. The materials and construction method used in modern frying pans vary greatly and some typical materials include:
The total flight duration from Seattle, WA to Shanghai, China is 11 hours, 58 minutes. This assumes an average flight speed for a commercial airliner of 500 mph, which is equivalent to 805 km/h or 434 knots. It also adds an extra 30 minutes for take-off and landing.
Could also connect via Seoul or Taipei. I tend to prefer NRT as the flight from the west coast is only about 10 hours while HKG is more like 14. Singapore and Cathay however have midnight flights from SFO to HKG which makes it easier to much of the flight. Might have similar flights out of LAX.