Dating old refrigerator
If the extra refrigerator tends to be empty, or home to just a few batteries, stale sodas or mystery containers of food, you should probably get rid of it altogether.
Think of all the extra space you’ll have in your garage for storing equipment or tools.
Ultrasound is sound waves with frequencies higher than the upper audible limit of human hearing.Auditory sensation can occur if high‐intensity ultrasound is fed directly into the human skull and reaches the cochlea through bone conduction, without passing through the middle ear.but many older people can hear the signals, which may be because of the considerable variation of age-related deterioration in the upper hearing threshold.Echolocation in bats was discovered by Lazzaro Spallanzani in 1794, when he demonstrated that bats hunted and navigated by inaudible sound and not vision.Francis Galton in 1893 invented the Galton whistle, an adjustable whistle which produced ultrasound, which he used to measure the hearing range of humans and other animals, demonstrating that many animals could hear sounds above the hearing range of humans.The first technological application of ultrasound was an attempt to detect submarines by Paul Langevin in 1917.The piezoelectric effect, discovered by Jacques and Pierre Curie in 1880, was useful in transducers to generate and detect ultrasonic waves in air and water.Only 0; Like new, 1 yr old Whirlpool refrigerator Purchased new in May 2012. Has a few small dents and a scratch from moving last month. wait a day or two and it is back to 38 on top and 0 on the bottom. If giving up your second refrigerator causes too much angst, consider opting for a smaller compact fridge.These units are smaller than a regular refrigerator but can still hold extra sodas and other small items.