If you use convection ovens, you will have to bake the potatoes for 45 minutes at 375 F or 60 minutes at 325 F or 90 minutes at 300 F. Convection ovens cook faster than regular ovens so the rule of thumb is to set the temperature in convection ovens at least 25 F lower than you would set in a regular oven.
The Earth's rotation around the sun is a constant. The definition of constant is something that doesn't change or something that continues or remains steady. An example of constant is the earth's rotation around the sun.
In mathematics, the adjective constant means non-varying. The noun constant may have two different meanings. It may refer to a fixed and well defined number or other mathematical object.