Representing points in 3d | Multivariable calculus | Khan Academy

2024/05/0319:37:04 science 331917

Representing points in 3d | Multivariable calculus | Khan Academy - DayDayNews

Representing points in 3d | Multivariable calculus | Khan Academy - DayDayNews

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1. Morphological characteristics: The body wings of Star Beetle are black, with multiple white spots on each elytra. Its body length is 50mm and its head width is 20mm. The body color is bright black; there is a white spot on the left and right sides of the front and back of the - DayDayNews

1. Morphological characteristics: The body wings of Star Beetle are black, with multiple white spots on each elytra. Its body length is 50mm and its head width is 20mm. The body color is bright black; there is a white spot on the left and right sides of the front and back of the

Feiben Classroom - Star Beetle

05/16 1952

The characteristics of ceramsite lightweight partition boards can be summarized in eight words - safe, comfortable, fast, environmentally friendly ceramsite wall panel production sample ceramsite partition boards are made of cement and ceramsite slurry mixed, foamed and solidifie - DayDayNews

The characteristics of ceramsite lightweight partition boards can be summarized in eight words - safe, comfortable, fast, environmentally friendly ceramsite wall panel production sample ceramsite partition boards are made of cement and ceramsite slurry mixed, foamed and solidifie

A new type of environmentally friendly building material - ceramsite wall panels

05/17 1015

It is estimated that many people have seen the scene of "dragon sucking water" on the Internet. In the sky covered with dark clouds, a thick water column rises from the water surface and goes straight to the dark clouds in the sky. It seems that some kind of material and substanc - DayDayNews

It is estimated that many people have seen the scene of "dragon sucking water" on the Internet. In the sky covered with dark clouds, a thick water column rises from the water surface and goes straight to the dark clouds in the sky. It seems that some kind of material and substanc

The rare spectacle of dragons sucking water has been frequently performed in my country recently! What draws water up to the sky?

05/16 1612

By examining the gel, which is formed from an exfoliating solution with added silica nanoparticles and solidifies as the temperature increases, the scientists discovered an unusual and previously unknown optical phenomenon. At 29 degrees, the gel transmits only red light, and at - DayDayNews

By examining the gel, which is formed from an exfoliating solution with added silica nanoparticles and solidifies as the temperature increases, the scientists discovered an unusual and previously unknown optical phenomenon. At 29 degrees, the gel transmits only red light, and at

Scientists create simple filter material with tunable wavelength transmission

05/15 1118

This satellite image from the Copernicus Sentinel-2 mission takes us above Kiev - Ukraine's capital and most populous city. (Please note that this picture was taken in 2019, so the flames and smoke of war are not visible). Kyiv, also known as Kiev, is visible just below the cente - DayDayNews

This satellite image from the Copernicus Sentinel-2 mission takes us above Kiev - Ukraine's capital and most populous city. (Please note that this picture was taken in 2019, so the flames and smoke of war are not visible). Kyiv, also known as Kiev, is visible just below the cente

Copernicus Sentinel 2 "Space Exploration of the Earth" Series: Ukraine - Kiev

05/16 1434

Do you know why mosquitoes prefer to bite you instead of others? First, the mosquitoes that bite you are usually female mosquitoes because they need to absorb nutrients to lay their eggs. Secondly, mosquitoes rely on smell and temperature to find prey, and can keenly sense the su - DayDayNews

Do you know why mosquitoes prefer to bite you instead of others? First, the mosquitoes that bite you are usually female mosquitoes because they need to absorb nutrients to lay their eggs. Secondly, mosquitoes rely on smell and temperature to find prey, and can keenly sense the su

Popular science knowledge: Do you know why mosquitoes don’t bite others but prefer to bite you?

05/16 1924

Jeffrey Sachs, chairman of the Lancet COVID-19 Committee, said: The new coronavirus does not have any natural origin. Rather, it was produced in an accident in a US biotechnology laboratory. - DayDayNews

Jeffrey Sachs, chairman of the Lancet COVID-19 Committee, said: The new coronavirus does not have any natural origin. Rather, it was produced in an accident in a US biotechnology laboratory.

Chairman of the Lancet COVID-19 Committee: The virus may have originated in a US biological laboratory

05/16 1693

Plants are grown in complete darkness in an acetate medium that replaces biophotosynthesis. Researchers are developing artificial photosynthesis to help make food production more energy efficient on Earth and perhaps one day on Mars. Photosynthesis has evolved in plants over mill - DayDayNews

Plants are grown in complete darkness in an acetate medium that replaces biophotosynthesis. Researchers are developing artificial photosynthesis to help make food production more energy efficient on Earth and perhaps one day on Mars. Photosynthesis has evolved in plants over mill

Artificial photosynthesis could produce food in complete darkness

05/16 1335

The first people to believe in some form of spontaneous generation were hundreds of years ago. In the 17th century, a number of respected figures in science, such as Francis Bacon and William Harvey, accepted this theory. However, in the 19th century, Louis Pasteur and other scie - DayDayNews

The first people to believe in some form of spontaneous generation were hundreds of years ago. In the 17th century, a number of respected figures in science, such as Francis Bacon and William Harvey, accepted this theory. However, in the 19th century, Louis Pasteur and other scie

Wonderful life - 2. Can life happen by chance (Part 1)

05/15 1420

A strange crystal that scientists have never seen before. Strange crystals under an electron microscope. Taskaev On February 15, 2013, a mysterious fireball streaked over Chelyabinsk in southern Russia. According to estimates, scientists believe that this is an asteroid with a di - DayDayNews

A strange crystal that scientists have never seen before. Strange crystals under an electron microscope. Taskaev On February 15, 2013, a mysterious fireball streaked over Chelyabinsk in southern Russia. According to estimates, scientists believe that this is an asteroid with a di

Nine years after a mysterious fireball fell in Russia, scientists discovered something strange there

05/16 1818

Atoms were once considered to be the basic particles of everything in the world, but later people discovered that atoms are composed of nuclei and electrons, and there is a vast space between the nuclei and electrons. How vast is it specifically? Let us take the simplest atom in - DayDayNews

Atoms were once considered to be the basic particles of everything in the world, but later people discovered that atoms are composed of nuclei and electrons, and there is a vast space between the nuclei and electrons. How vast is it specifically? Let us take the simplest atom in

What exists in the vast space between the nucleus and the electrons? Is it an absolute vacuum?

05/18 1428

I once read "Insects" when I was young, and I was full of yearning for the insect world described by Fabre. I often turned over stones or inspected leaves to look for the small insects hiding in the depths. As I get older, I gradually develop an inexplicable fear of insects in na - DayDayNews

I once read "Insects" when I was young, and I was full of yearning for the insect world described by Fabre. I often turned over stones or inspected leaves to look for the small insects hiding in the depths. As I get older, I gradually develop an inexplicable fear of insects in na

An insect pocket book that brings you closer to nature

05/18 1720

We often say that China has five thousand years, which naturally adds up to ten thousand years. Ten thousand years ago is a very interesting node, because it is the time period when humans turned from hunting life to farming. Farming represents villages, and the combination of vi - DayDayNews

We often say that China has five thousand years, which naturally adds up to ten thousand years. Ten thousand years ago is a very interesting node, because it is the time period when humans turned from hunting life to farming. Farming represents villages, and the combination of vi

Could it be said that humans more than 12,000 years ago really existed?

05/18 1065

@真知新ordinate Popular science and cold knowledge 1. Lamprey Lamprey has lived on the earth for hundreds of millions of years, and it has always maintained its appearance in ancient times, so it is also called a "living fossil." Later this creature was assigned to the superclass Ag - DayDayNews

@真知新ordinate Popular science and cold knowledge 1. Lamprey Lamprey has lived on the earth for hundreds of millions of years, and it has always maintained its appearance in ancient times, so it is also called a "living fossil." Later this creature was assigned to the superclass Ag

Seven exotic species, one relies on breeding and one is prohibitive

05/18 1704

When you see a cockroach, do you still kick it and send it to its death? As everyone knows, if you do this, not only will the number of cockroaches in your home not decrease, but they will increase in number. So, why does this happen? The more cockroaches you fight, the more cock - DayDayNews

When you see a cockroach, do you still kick it and send it to its death? As everyone knows, if you do this, not only will the number of cockroaches in your home not decrease, but they will increase in number. So, why does this happen? The more cockroaches you fight, the more cock

Don’t step on cockroaches in your home! How to control cockroaches that are still alive even though their heads are severed?

05/18 1074

The editor has recently become obsessed with ferns. Their leaves generally have a mathematical beauty like the golden ratio. There are many types, and most of them are beautiful. They can be seen in forests, riversides, and in the courtyards of ancient houses. Fern and nautilus a - DayDayNews

The editor has recently become obsessed with ferns. Their leaves generally have a mathematical beauty like the golden ratio. There are many types, and most of them are beautiful. They can be seen in forests, riversides, and in the courtyards of ancient houses. Fern and nautilus a

Fragrant garden | "Pteridophylla fern", the "living fossil" of the plant world

05/18 1059

From the animation production point of view, "Lycoris Reoil" is a big deal this time. A1, Kusanagi, and Shigami Clover Works are animation production companies that we are very familiar with. - DayDayNews

From the animation production point of view, "Lycoris Reoil" is a big deal this time. A1, Kusanagi, and Shigami Clover Works are animation production companies that we are very familiar with.

The new show "Lycoris Recoil" in July is a real daily and fake battle show? It's enough to have stickers

05/18 1677

Hubei Daily (Reporter Liu Hanze, Correspondents Yu Ling, Wei Jiafeng) Recently, the golden-collared swallowtail butterfly, a national second-level protected animal known as the "most beautiful butterfly", appeared in Shennongjia. This is the first time that this kind of butterfly - DayDayNews

Hubei Daily (Reporter Liu Hanze, Correspondents Yu Ling, Wei Jiafeng) Recently, the golden-collared swallowtail butterfly, a national second-level protected animal known as the "most beautiful butterfly", appeared in Shennongjia. This is the first time that this kind of butterfly

"The most beautiful butterfly" appears in Shennongjia

05/18 1848

On December 15, some media reported that Qiu Ze responded to the flash marriage in an interview. He said with a smile that he felt very happy when someone could eat with him every day, so he wanted to get married. - DayDayNews

On December 15, some media reported that Qiu Ze responded to the flash marriage in an interview. He said with a smile that he felt very happy when someone could eat with him every day, so he wanted to get married.

40-year-old Qiu Zeshou responded to his flash marriage to Tiffany Hsu, giving his wife a 4 million wedding ring, and also revealed that he was planning a wedding

05/18 1103

She is also a Teddy, younger than mine. Her owner is a woman in her forties. She looks at my Hanamaki with warm eyes. When she is eager to confess her love, her voice is soft and a bit sweet like glutinous rice dumplings. - DayDayNews

She is also a Teddy, younger than mine. Her owner is a woman in her forties. She looks at my Hanamaki with warm eyes. When she is eager to confess her love, her voice is soft and a bit sweet like glutinous rice dumplings.

My Hanamaki is a star

05/18 1882

Raising a cat is really a happy and healing thing, and now more and more people are raising cats. After many people bring a cat home, the first thing they do is to give the cat a name to facilitate future communication. However, there are many things to pay attention to when nami - DayDayNews

Raising a cat is really a happy and healing thing, and now more and more people are raising cats. After many people bring a cat home, the first thing they do is to give the cat a name to facilitate future communication. However, there are many things to pay attention to when nami

There are many things to pay attention to when naming cats. Avoid these 6 "taboos" and don't take them seriously.

05/18 1054

There are many breeds of dogs, but some ferocious big dogs are rarely kept by people and are mainly included in the list of prohibited dogs. But in some rural areas and small cities, they are not so strict, so some big dogs are also raised by people. 6 types of dogs that are pron - DayDayNews

There are many breeds of dogs, but some ferocious big dogs are rarely kept by people and are mainly included in the list of prohibited dogs. But in some rural areas and small cities, they are not so strict, so some big dogs are also raised by people. 6 types of dogs that are pron

6 types of dogs that are prone to jumping and biting. They are highly aggressive. If you see them, it’s best to avoid them.

05/18 1598