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Science

The observation, identification, description, experimental investigation, and theoretical explanation of phenomena is all part of science. Nothing is immune to the scientific process: from charm quarks that haven't existed naturally since the beginning of time to Pluto, recently demoted from planet to dwarf planet. Questions on knowledge about the material and physical aspects of our world are asked and answered here.

203,801 Questions

What are the animal classification groups?

Animals are classified into different groups based on shared characteristics. The main classification groups for animals are kingdom, phylum, class, order, family, genus, and species. This system is known as the taxonomic hierarchy, with each level becoming more specific as you move down the hierarchy.

Why do cats produce less sperm and eggs than frogs?

Cats are mammals and have a higher reproductive investment in each offspring, so they produce fewer sperm and eggs to increase the chances of successful fertilization. Frogs, being amphibians, typically produce more sperm and eggs to increase the chances of fertilization due to external fertilization and lower parental care.

Who founded TV?

Philo Farnsworth is credited with inventing the first fully functional all-electronic television system in 1927. However, John Logie Baird is also known for demonstrating the world's first working television system in 1925.

What is the casue of spectral lines?

Firstly spectral lines means the spectrum the band of 7 colors. The spectral lines are formed because when the light passes through tough medium it passes through the medium but the white light gets disintegrated into seven colors . The band includes the colors violet, indigo, blue, green ,yellow orange , red.

Are balloons and rockets considered similar?

Balloons and rockets are both used for controlled flight, but they operate in different ways. Balloons rely on buoyancy to float and rise, while rockets work by expelling propellant in the opposite direction to generate thrust. Overall, they serve different purposes and are designed for different types of missions.

What time will ISS pass over Vancouver bc Canada?

Assuming the sky is clear, there will be a very visible pass on Dec 31st beginning at 5:59:55pm and peaking at 6:02:51p Pacific Standard Time.

The ISS passes over Vancouver BC four or five times a day.

What are methods in sexual reproduction in animals?

Reproduction in most mammals involves internal fertilization by the male of one or more eggs in the female. The most common method of delivery is the placental form, where fairly well-developed offspring develop in the uterus and are born live. The other two delivery methods are

1) the marsupial, where a less-developed offspring leaves the uterus through the vagina and travels to a pouch where it completes its maturation.

2) the monotreme, where the fertilized embryo is encased in an egg, as with most birds and reptiles, and develops mainly there, then hatches in a burrow where it begins to suckle on the mother.

What would happen if there was no stars?

Nothing. They are so far away that they have no effect on us apart from being pretty lights. Of course the sun is a star, and if that went away then the temperature here on Earth would quickly get down to -270C and we would all die. x[

How does a yak adapt to its environment?

Yaks have adapted to their high-altitude environments by developing thick fur to protect them from the cold and harsh weather conditions. They also have large lungs and efficient blood circulation to help them thrive in low-oxygen environments. Yaks are able to survive on tough, high-fiber vegetation that grows at high altitudes, making them well-suited to their habitats.

What are some spherical objects at home?

So far I have a list of this:

ping pong ball

ornament

bouncy ball

rounded/crumpled up piece of paper

cotton ball

Nerf ball

ball of yarn

Where is the red magnifying glass at the beach?

south of the yellow and red umbrella next to a guy holding 2 bottles

What is one species from which man was evolved?

cavemen cavemen are men but the best answer is a monkey or chimp ^w^

How are millipeds and centipeds important?

Millipedes and centipedes are important in ecosystems as decomposers, breaking down organic matter. They also provide a food source for birds, reptiles, and other predators. Additionally, they help aerate soil and contribute to nutrient recycling.

What is the most dangerous object in the universe?

Black holes are considered one of the most dangerous objects in the universe due to their intense gravitational pull that can trap even light. They can devour neighboring celestial bodies and release powerful jets of energy that can destroy anything in their path.

Who were the first people known to study magnetism and use magnets to build compass nearly 2000 years ago?

The ancient Chinese were the first people known to study magnetism and use magnets to build compasses around 2000 years ago. They discovered that a magnetic rock called lodestone could align itself with the Earth's magnetic field, leading to the development of the first compasses for navigation.

How can the oxygen store in myoglobin be replaced after use?

Myoglobin has a very high affinity for oxygen, meaning it binds it very strongly. At very low oxygen concentrations in the cell, myoglobin releases its oxygen, despite the high affinity, simply because there are too few oxygen molecules around to rebind to the myoglobin when they are released naturally from the myoglobin (which usually occurs anyway).

Once the oxygen concentration increases again, returning to normal, oxygen molecules will collide with myoglobin. The myoglobin, with its high oxygen affinity, will strongly bind any oxygen that meets it, replenishing myoglobin's oxygen storage very quickly.

As myoglobin's affinity for oxygen is stronger the haemoglobin's, it will 'steal' oxygen from haemoglobin in the blood very easily, replacing its bound oxygen.

This binding system serves to release oxygen when it is needed if blood oxygen levels are reduced (due to high levels of exercise), but replenishes the supply when oxygen levels begin to rise again.

How much time is one year?

There are 31,556,925.9936 seconds in a year, 525 948.766 minutes, 8,765.812776 hours, 365.25 days, 52 weeks, 12 months, or 1 year.

What does granite change into when put under pressure?

When put under pressure, granite can change into a metamorphic rock called gneiss. Gneiss forms from the re-crystallization of granite under high temperatures and pressures, resulting in a distinctive banded appearance and different mineral composition.

What does scientist Alhazen discovered?

Alhazen, known as the "father of modern optics," made significant contributions to the field of optics. He formulated the first comprehensive theory of vision and documented the anatomy of the eye. Alhazen also discovered the principles of reflection and refraction of light.

Why does dust gather?

Dust gathers due to a combination of factors, such as shedding skin cells, fabric fibers, dirt from outside, and pet dander. These particles settle on surfaces due to gravity and air currents, forming a layer of dust over time. Regular cleaning can help manage dust buildup in indoor spaces.

How does the length of day effect the amount of energy reaching the Earth?

The earth's prbit around the sun is not circular, it is an ellipse. the earth is further from the sun at the ends of the ellipse than when it is in the middle.

The length of day is a local effect, based on the angling of the earth's axis towards the sun. When the days are longest in the northern hemisphere they are shortest in the southern hemisphere, and vice versa. These days occur when the earth is at its orbit's greatest distance from the sun.

When the days are closest to being as long as the nights, the earth is at its orbit's shortest distance from the sun.

When the earth is nearest the sun it receives a greater amount of energy than when it is further away.

How long if cockroach live in an air tight container?

A cockroach can survive without air for about 40 minutes. However, in an airtight container, it would eventually die due to a lack of oxygen. The exact time it takes to die would depend on how much air is initially contained in the container.

Do you hear jets before you see them?

Yes, jets often create sound waves that travel faster than the aircraft itself, so you may hear them before they become visible. This can depend on various factors such as the distance between you and the jet, weather conditions, and the aircraft's speed and altitude.

Which is most poisonous creature in earth?

The box jellyfish is considered one of the most poisonous creatures on Earth. Its venom can cause a very painful and potentially deadly sting to humans if you encounter one. However, it's important to note that "most poisonous" can vary depending on factors such as delivery method and toxicity level.