1 90% of the atmosphere by mass is below an altitude of 16 km. 2  The common altitude of commercial airliners is about 10 km. 3  99.99997% of the atmosphere by mass is below 100 km. 4  The highest X-15 plane flight in 1963 reached an altitude of 354,300 ft (108.0 km).
Add the seasoned flounder fillets to the pan when the oil begins to shimmer. Saute the flounder for roughly 3 to 4 minutes per side, or until the flesh becomes opaque and is firm to the touch. If you are unsure if the fish is done, use an instant-read thermometer. The flounder is thoroughly cooked if the internal temperature is 145 Fahrenheit.
How to Make It. 1  Butter a shallow baking dish. Heat the oven to 325 F (165 C/Gas 3). 2  Cut the flounder fillets into serving-size portions and arrange the pieces in the prepared baking dish. Sprinkle the fish with 1 teaspoon of salt and the freshly ground black pepper.