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May 21, 2020

Helpful Hints from joeeze: Water can "explode" in your microwave

Who knew?

Here's the back story, related in an enlightening column by James and Morris Carey.

Danger lurks in the microwave

A man placed a cup of cold water into his microwave to bring it to a boil. He had done this on numerous occasions. We do not know what length of time was set on the microwave. When it stopped, the man removed the cup, looked into it and noticed the water was not boiling.

Suddenly the water in the cup "exploded." While the cup remained intact, the hot water splashed onto his face, giving him first- and second-degree burns to his entire face and neck.

While at the hospital, the attending physician told the man that the circumstances surrounding his injuries were fairly common. How would you like to be told that such a common event could produce such serious injuries — on a regular basis?

What we found is that water (alone) should never be heated in a microwave oven. When water is heated in a microwave, something should be placed in the cup to diffuse the energy — such as a wooden stir stick or even a tea bag. Obviously, nothing metal should be used.

Here is how a major appliance manufacturer responded to the above event:

"Thanks for contacting us. The information that you received is correct. Microwaved water and other liquids do not always bubble when they reach their boiling point. They can actually become superheated and not bubble at all. The superheated liquid will bubble up out of the cup when it is moved or when something like a spoon or tea bag is placed therein."

Here is what one expert had to say: "I have seen this happen before. It is caused by a phenomenon known as "super heating." It can occur anytime water is heated and will particularly occur if the vessel that the water is heated in is new, or when heating a small amount (less than half a cup).

"What happens is that the water heats faster than vapor bubbles can form. If the cup is very new, it is unlikely to have small surface scratches inside it that provide a place for the bubbles to form. As the bubbles cannot form and release some of the heat that has built up, the liquid does not boil and it continues to heat up well past its boiling point.

"Bumping or jarring the container can cause bubbles to rapidly form and expel the hot liquid. The rapid formation of bubbles is also why a carbonated beverage spews when opened after having been shaken."

To prevent water from exploding in a microwave:

• Do not heat any liquid for more than two minutes per cup.

• After heating, let the cup stand in the microwave for 30 seconds before attempting to remove it or add anything to it.

• Use a container whose interior surface is at least a little scratched.

• Tap the outside of the container a few times with a solid object while it is still in the oven. Use a long object so that your hand remains outside the oven.

• Keep your face well away from the open oven door and from the container.

All of these precautions should reduce the chance or extent of superheating and resultant injury. Nevertheless, very hot water is always dangerous and one should always treat it with caution.

May 21, 2020 at 04:01 PM | Permalink | Comments (3)

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day.

May 21, 2020 at 02:01 PM | Permalink | Comments (0)

My homemade running trail

May 21, 2020 at 12:01 PM | Permalink | Comments (2)

Whale Fall

From Wikipedia:

A whale fall occurs when the carcass of a whale has fallen onto the ocean floor at a depth greater than 1,000 m (3,300 ft), in the bathyal or abyssal zones. 

On the sea floor, these carcasses can create complex localized ecosystems that supply sustenance to deep-sea organisms for decades.

This is unlike in shallower waters, where a whale carcass will be consumed by scavengers over a relatively short period of time.

Whale falls were first observed in the late 1970s with the development deep-sea robotic exploration. Since then, several natural and experimental whale falls have been monitored through the use of observations from submersibles and remotely operated underwater vehicles (ROVs) in order to understand patterns of ecological succession on the deep sea floor.

Deep sea whale falls are thought to be hotspots of adaptive radiation for specialized fauna. 

Organisms that have been observed at deep-sea whale fall sites include giant isopodssquat lobstersbristlewormsprawnsshrimplobstershagfishOsedaxcrabssea cucumbers, and sleeper sharks.

New species have been discovered, including some potentially specializing in whale falls. 

It has been postulated that whale falls generate biodiversity by providing evolutionary stepping stones for multiple lineages to move and adapt to new environmentally-challenging habitats.

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Researchers estimate that 690,000 carcasses/skeletons of the nine largest whale species are in one of the four stages of succession at any one time. 

This estimate implies an average spacing of 12 km (7.5 mi) and as little as 5 km (3.1 mi) along migration routes.

They hypothesize that this distance is short enough to allow larvae to disperse/migrate from one to another.

Whale falls are able to occur in the deep open ocean due to cold temperatures and high hydrostatic pressures.

In the coastal ocean, a higher incidence of predators as well as warmer waters hasten the decomposition of whale carcasses. 

Carcasses may also float due to decompositional gases, keeping the carcass at the surface.

The bodies of most great whales (baleen and sperm whales) are slightly denser than the surrounding seawater, and only become positively buoyant when the lungs are filled with air.

When the lungs deflate, the whale carcasses can reach the seafloor quickly and relatively intact due to a lack of significant whale fall scavengers in the water column.

Once in the deep-sea, cold temperatures slow decomposition rates, and high hydrostatic pressures increase gas solubility, allowing whale falls to remain intact and sink to even greater depths.

May 21, 2020 at 10:01 AM | Permalink | Comments (0)

SixPad Arm Belt Training Gear — "EMS arm muscle toning system"

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From the website:

MTG and the SixPad series has done it again with the SixPad Arm Belt Training Gear.

This dedicated arm trainer device works on the biceps and triceps.

Using a high-quality soft silicone and utilizing Kyoto University professor Toshiro Moritani's CMM pulse and EMS technology, this is one of the best training products available today — so good that even star athletes like Cristiano Ronaldo use it in their training regime.

Compatible with Bluetooth, the device can also synch with your smartphone to track your workout progress.

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Features and Details:

• Materials: silicone rubber, ABS, PET, elastomer, silver conductive, carbon ink, PET, PP, paper/high-conductivity gel sheet, acrylic polymer

• Includes: 1 x mat, 2 x gel sheets, 1 x clear case, 2 x fixing bands, 1 x protective cover, AC adapter

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• Electrical muscle stimulation (EMS) 20 Hz, 20 levels

• Built-in Bluetooth, visualization training record app

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• Power supply: rechargeable battery

• Optional extra gel sheets available

• Device dimensions: 6.5" x 5.8"

• Device weight: 2.4 ounces

• Instructions: Japanese

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$472.

May 21, 2020 at 08:01 AM | Permalink | Comments (0)

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