A. Metal objects are always magnetic. B. Some metal objects are magnetic. C. All magnets are made of metal. D. Magnets can attract all objects. 相关知识点: 试题来源: 解析 B。解析:选项 A 金属物体总是有磁性说法错误;选项 C 所有磁铁都是由金属制成错误,磁铁有多种材料;选项 D 磁铁能吸引...
Did you know magnets(磁铁)are all around you? Magnets help you do wonderful things! Keep reading! See if you think magnets have surprising uses. Magnets Push or Pull Look closely and you will see. Magnets can be found in a fridge. The magnet attracts or pulls the metal to make the ...
Magnets Push or Pull Look closely and you will see.Magnets can be found in a fridge.The magnet attracts or pulls the metal to make the door closed.Do you know how?A magnet pulls things made of metals called iron(铁) and steel.But it will not pull other things,such as a wooden penci...
As we’ve learned, not all types of metal are magnetic. Some metals not considered magnetic include: Aluminum Copper Lead Brass Gold Silver Titanium Bismuth Magnesium Molybdenum Tantalum Tin Any alkali metals What can magnets be used for? There are so many ways magnets are used in everyday lif...
What’s likely happening here is that door magnets don’t keep all debris and moisture out. Moisture alone shouldn’t mess up stainless steel, but moisture from a roadway likely contains all sorts of contaminants, some metal. When different types of metal are brought into contact with each ot...
Did you know magnets(磁铁) are all around you?Magnets help you do wonderful things!Keep reading!See if you think magnets have surprising uses. Magnets Push or Pull Look closely and you will see.Magnets can be found in a fridge.The magnet attracts or pulls the metal to make the door clos...
Did you know magnets (磁铁) are all around you?Magnets help you do amazing things!Keep reading!See if you think magnets have surprising uses.Magnets Push or Pull Look closely and you will see.Magnets can be found in a fridge.The magnet attracts or pulls the metal to make the door closed...
Before you get all confused, they are both the same. A ferrite magnet is a type of magnet that some people consider a ceramic magnet because it is made from ceramic material. Ferrite magnets are composed of a mixture of metal and iron oxide. Also, they are very durable and strong, and...
Magnets are materials that produce magnetic fields, which attract specific metals. Every magnet has a north and a south pole. Opposite poles attract, while like poles repel. While most magnets are made from metals and metal alloys, scientists have devised ways to create magnets from composite mat...
Ferromagnetic metals like iron, cobalt and nickel are strongly attracted to magnets, and paramagnetic metals like tungsten and platinum have a weaker attraction to magnets.