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.
A. The banging is the vibration of metal coils in the machine caused by rapid pulses of electricity, said Dr. Keith Hentel, chief of emergency/musculoskeletal imaging at NewYork-Presbyterian Hospital/Weill Cornell Medical Center.he pulses cause not just the desired changes but undesired vibrations of the gradient coils, resulting in the banging heard during an M.R.I. examination. As stronger magnets result in stronger vibrations, the higher the field strength of the M.R.I. scanner, measured in teslas, the louder the banging, Dr. Hentel said.