Avocados are high in fat. But it's monounsaturated fat, which is a good fat that helps lower bad cholesterol, as long as you eat them in moderation. Avocados have a lot of calories. The recommended serving size is smaller than youâd expect: 1/5 of a medium avocado (or 1 ounce) is 50 calories.
Why do transformers hum? Transformer noise is caused by a phenomenon which causes a piece of magnetic sheet steel to extend itself when magnetized. When the magnetization is taken away, it goes back to its original condition. This phenomenon is scientifically referred to as magnetostriction.
The heat in a transformer is due to copper loss and core loss, neither of which is due to voltage. Copper loss is the I^2R loss due to the current and resistance, and core loss is due to the magnetic material and magnetic field which is also current derived. â Martin Mar 3 '11 at 17:50.