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Is there dark matter on earth?
Absolutely! and we have a pretty fair idea how much, too. The density of dark matter near the Sun is around 6×10−28 6 × 10 − 28 kg/cm^3. Given the volume of the Earth is about 10^27 cm^3, this means that the amount of dark matter contained within the Earth at any given time is a whopping 0.6 kg — aRead more
Absolutely! and we have a pretty fair idea how much, too. The density of dark matter near the Sun is around 6×10−28 6 × 10 − 28 kg/cm^3. Given the volume of the Earth is about 10^27 cm^3, this means that the amount of dark matter contained within the Earth at any given time is a whopping 0.6 kg — a bit over a pound!
See lesswhat is dark matter?
Dark matter is very different from the ordinary matter we see and interact with every day. Dark matter interacts very weakly or almost not at all with the ordinary matter that we and our measuring instruments are made of. The exception is that dark matter does exert gravitational attraction, just liRead more
Dark matter is very different from the ordinary matter we see and interact with every day. Dark matter interacts very weakly or almost not at all with the ordinary matter that we and our measuring instruments are made of. The exception is that dark matter does exert gravitational attraction, just like ordinary matter.
See lessThe satellite is normally placed in?
The satellite orbiting the earth is normally placed in Exosphere.
The satellite orbiting the earth is normally placed in Exosphere.
See lessHow far away is thunder and lightning?
As lightning flashes in the sky, it causes thunder. Light from the flash travels almost instantly to your eyes, but the sound of the thunder arrives a few seconds later. If you count the seconds between the flash and the thunder, you can estimate the distance of the flash of lightning: every five seRead more
As lightning flashes in the sky, it causes thunder. Light from the flash travels almost instantly to your eyes, but the sound of the thunder arrives a few seconds later. If you count the seconds between the flash and the thunder, you can estimate the distance of the flash of lightning: every five seconds equals 1 mile (1.6 kilometers).
See lessWhy are rain clouds gray?
Rain clouds are generally dark gray because light cannot penetrate them due to the deep and densely packed water droplets and ice inside the cloud. Generally, the color of a cloud depends on the cloud’s relationship to the sunlight. Thus clouds appear gray when they block sunlight. The thicker the cRead more
Rain clouds are generally dark gray because light cannot penetrate them due to the deep and densely packed water droplets and ice inside the cloud. Generally, the color of a cloud depends on the cloud’s relationship to the sunlight. Thus clouds appear gray when they block sunlight. The thicker the cloud, the more light it blocks. When a cloud is about 3,000 feet (about 900 meters) thick, hardly any sunlight will make its way through the cloud.
See lessHow do clouds float?
Although the water and ice in clouds may typically weigh tons, the weight of a cloud is spread out over a very large area. The cloud’s droplets are also very small—about one-hundred-thousandth of an inch across. A cloud’s individual particles are so small, in fact, that warm air rising from Earth’sRead more
Although the water and ice in clouds may typically weigh tons, the weight of a cloud is spread out over a very large area. The cloud’s droplets are also very small—about one-hundred-thousandth of an inch across. A cloud’s individual particles are so small, in fact, that warm air rising from Earth’s surface is able to keep them floating in the air.
See lessWhy is the sky blue?
The white light of the Sun consists of many wavelengths. When seen separately, each wavelength corresponds with a different color. The air molecules and particles of matter that make up Earth’s atmosphere scatter some of the Sun’s light as it travels to Earth, especially the shorter wavelengths thatRead more
The white light of the Sun consists of many wavelengths. When seen separately, each wavelength corresponds with a different color. The air molecules and particles of matter that make up Earth’s atmosphere scatter some of the Sun’s light as it travels to Earth, especially the shorter wavelengths that give us the color blue. Coming to us from all angles in the sky, these light waves make the sky appear blue.
See lessIs it true that at one time there was no oxygen?
Oxygen is necessary for all humans, animals, and plant life to survive. When Earth was first formed, its atmosphere had no oxygen—the colorless, odorless, and tasteless gas that makes up about 20 percent of the air we breathe. It consisted instead solely of a deadly combination of hydrogen, methane,Read more
Oxygen is necessary for all humans, animals, and plant life to survive. When Earth was first formed, its atmosphere had no oxygen—the colorless, odorless, and tasteless gas that makes up about 20 percent of the air we breathe. It consisted instead solely of a deadly combination of hydrogen, methane, ammonia, and hydrogen cyanide. The hydrogen escaped into space, and ultraviolet radiation from the Sun broke down the mixture, leaving only nitrogen and carbon dioxide. Only when life began and photosynthesis (the conversion of light energy into chemical energy by living organisms) occurred did oxygen first appear—about 3.4 billion years ago.
See lessAppleton layer is a part of ?
Appleton layer, upper layer (called F2) of the F region of the ionosphere. The layer was named for British physicist Sir Edward Victor Appleton.
Appleton layer, upper layer (called F2) of the F region of the ionosphere. The layer was named for British physicist Sir Edward Victor Appleton.
See lessWhat layer of the atmosphere has the aurora borealis in it?
The aurora borealis, also known as the Northern Lights, occurs in the thermosphere. This is the layer of the atmosphere that is located above the mesosphere and extends into outer space. The thermosphere is characterized by high temperatures and low density of air molecules. When charged particles fRead more
The aurora borealis, also known as the Northern Lights, occurs in the thermosphere. This is the layer of the atmosphere that is located above the mesosphere and extends into outer space. The thermosphere is characterized by high temperatures and low density of air molecules. When charged particles from the sun collide with the gases in the thermosphere, it creates the beautiful light display known as the aurora borealis.
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