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.
One of the most annoying sources of noise and vibration, and one that is sometimes confused with wheel vibration, is that caused by resonant vibration in the exhaust system. At certain speeds, the natural oscillations that occur in the exhaust may âstack upâ causing the exhaust system to buzz or resonate.