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What metals cant be picked up by electromagnets?
Many metals cannot be picked up by electromagnets (at room temperature). For instance, aluminum, gold, mercury, and copper will not be attracted to an electromagnet. Iron sticks to an electromagnet at normal temperatures. If iron is too hot, it loses its magnetic abilities. This is true of all metals: if they're cold enough they exhibit magnetic properties, if they're too hot they don't show magnetic properties. Even mercury (liquid at room temperature) can be made magnetic if it's cooled to very low temperatures.
What process occurs as peices of dry ice gradually get smaller?
Sublimation.The frozen CO2 changes directly from solid into a gas. It can only remain in a solid form because of the very low temperatures it is kept at. At room temperatures it begins to change (sublime) from a solid directly into a gas (skipping the liquid state).
All substances are this at very low temperatures?
All substances are in a solid state at very low temperatures, due to the very slow movement of their particles. This phenomenon is known as cryogenics, where materials are cooled to extremely low temperatures to achieve various scientific and practical purposes.
What phase of matter are most elements when they are at a very low temperature?
Most elements are solids when they are at very low temperatures.
What spectrum does white light form?
when dispersed through a prism: Visible spectrum of light (rainbow) part of (very small fraction) electromagnets spectrum
Why are electromagnets used in many electronics?
Electromagnets are used in many electronic devices because they can be used to lift very heavy objects. They are also in machines doctors and scientists use everyday. As you can see, electromagnets are used in many different ways!
What are electromagnets used to record information on?
Electromagnets...electromagnets are magnets attract, or pull, some kinds of metal objects. Stronger magnets exert a greater pull on the objects they attract. Sometimes it would be useful if you could turn off a magnet when you did not want it to attract objects. That is what an electromagnet can do. Some electromagnets .in power plants and factories electromagnets are very large. You can make a small, simple electromagnet in school or at home.
What metals cant be picked up by electromagnets?
Many metals cannot be picked up by electromagnets (at room temperature). For instance, aluminum, gold, mercury, and copper will not be attracted to an electromagnet. Iron sticks to an electromagnet at normal temperatures. If iron is too hot, it loses its magnetic abilities. This is true of all metals: if they're cold enough they exhibit magnetic properties, if they're too hot they don't show magnetic properties. Even mercury (liquid at room temperature) can be made magnetic if it's cooled to very low temperatures.
What substances are this state at a very low temperatures?
At very low temperatures most substances are in solid state.
Can both permanent magnets and electromagnets hold their magnetism for a long period of time?
Permanent magnets can hold their magnetism for a very long time with minimal loss, while electromagnets require a continuous supply of electricity to maintain their magnetic field.
How is the ice castle built each year?
The ice castle is built by compacting tons of snow into blocks, and then building from there whilst kept at very low temperatures. This can then be carved into to create more intricate designs.
Why bananas turn brown color?
The skin of a banana turns brown or black because the skin is very sensitive and when it is kept in cold temperatures... the skin begins to low its quality, therefore turning it darker.
What are the disadvantages for natural gas?
it produces greehouse gases* Supplies are limited (but it can still be synthesized if needed)* Releases CO2 in combustion* To store in a limited space, it either must be liquified (by chilling it to VERY cold temperatures) or kept under very high pressure.
What do you do if your cold water white cloud fish is pregnant?
White Cloud Mountain Minnows (Tanichthys albonubes) are a TROPICAL fish and should be kept at around 64F to 75F. Although they are very tough and can stand being kept in cold water conditions their life span is greatly reduced by being kept at too cold temperatures. They are egg layers and so can not get pregnant.
Why are electromagnetic used In many electronic devices?
Electromagnets are used in many electronic devices because they can be used to lift very heavy objects. They are also in machines doctors and scientists use everyday. As you can see, electromagnets are used in many different ways!
What process occurs as peices of dry ice gradually get smaller?
Sublimation.The frozen CO2 changes directly from solid into a gas. It can only remain in a solid form because of the very low temperatures it is kept at. At room temperatures it begins to change (sublime) from a solid directly into a gas (skipping the liquid state).
All substances are this at very low temperatures?
All substances are in a solid state at very low temperatures, due to the very slow movement of their particles. This phenomenon is known as cryogenics, where materials are cooled to extremely low temperatures to achieve various scientific and practical purposes.
