Pink salmon — too much of a good thing? - Geophysical Institute
2024年12月19日 · Pink salmon born in hatcheries, where professionals harvest eggs from wild salmon and rear them in captivity before releasing them in the ocean, have doubled in numbers since 1990. Russians have pink salmon hatcheries that increase numbers in the North Pacific and Bering Sea Alaskans run hatcheries in Valdez and other places in Prince William ...
Aurora Forecast - Geophysical Institute
1 天前 · The aurora is most often seen as a striking green, but it also occasionally shows off other colors, ranging from red to pink or blue to purple. Oxygen at about 60 miles up gives off the familiar green-yellow color, while oxygen at higher altitudes (about 200 miles above Earth’s surface) gives all-red auroras.
Why Does the Pink Color in a Titration Fade Over Time? - Physics …
2007年3月26日 · In summary, the pink color obtained from the 2-3 phenolphthalein indicator at the end point of the titration gradually disappears over time due to the absorption of CO2 from the air, which produces the weak acid HCOOOH. This results in a drop in pH and the color of phenolphthalein is dependent on the pH of the solution.
Why does a Walrus Blush? - Geophysical Institute
2024年12月19日 · Various investigators have suggested that the circulation in the skin and hind flippers of pinnipeds plays an important role in maintaining the animal's thermal equilibrium. The skin of walruses becomes pallid when it is exposed to cold air or water and changes to pink when exposed to warmer ambient temperatures.
Paint Statue that changes color with weather/airpressure - Physics …
2009年2月7日 · I Found an old keepsake when I recently moved that I bought in Italy 15 years ago. It was a small statue of an owl that changed color when the weather was changing. It would be pink, blue most often or sometimes green. That statue itself didn't change, but rather it was the paint on it. The paint was kinda thick and sparkling.
Plasma Color: What Makes It Blue & What Colors It Can Be?
2011年1月6日 · Depends on the lamp. Incandescents - while don't contain plasma - emit the light just because wire is hot. In gas discharge lamps atoms (or molecules) get excited by collisions with electrons or other ions/atoms that were accelerated by the electric field between electrodes, then they emit photons when falling back to lower energy states.
What do the blue and pink color of the rust indicator shown mean?
2014年10月12日 · What do the blue and pink color the rust indicator shown mean? Let say, the mixture of potassium hexacyanoferrate(III) and phenolphthalein is the rust indicator. And we use to detect the rusting of an iron nail. And the result is: the tip, head region of the nail appear blue color; the straight region appears pink color.
Why does my Patton-Reeder indicator immediately turn blue?
2019年12月13日 · So I made a new solution, adjusted to pH 12, and this time it turned pink. I added the EDTA, then it turned blue. No idea what went wrong the first time, maybe too much indicator so the pink looked purple / blue. Anyway, now back on track! Thanks Borek, otherwise I would have ended up with some concoction of magnesium, potassium, sodium etc etc.
What sound frequencies can pass through a hole in a wall?
2024年2月17日 · Real world scenario: the hole in wall is something you can drill - 5mm diameter R and 20mm length L. Ratio 1 to 4. Hole inside is 100% reflective. Music or pink noise plays on the other side of the wall. Which range from 200Hz to 5kHz will transfer best?
Blue Moons and Lavender Suns | Geophysical Institute
Shades varying from pink and orange to yellow and brown were used to describe the sky.... The sun disc when visible appeared blue or purple. As it appeared and disappeared through breaks in the clouds it seemed to be in motion -- hence the basis for the impression of flying saucers."