the mystery of magnets is an interesting study subject. Magnets attract certain things, repel others and are a necessary component to many of the items we use in daily life. The question of what objects are attracted to magnets leads to surprising results. ...
The experiment shows that when a magnet is brought near some metal objects, they are attracted to the magnet. What can we conclude? 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. ...
19-4How a Magnet WorksSome objects are attracted to each other. And someobjects repel each other A magneti an object thatcan attract or repel other object. Magnets can movethingslik iron or steel withouttouching them. Howdoes a magnet work? A magnetis a piece of magnetized metal like iron...
Goods to be displayed such as watches are attached to curved mounting strips (20) typically formed from aluminium. To each of the strips is attached a small steel plate (22) by e.g. welding or gluing. The steel plates can be pressed against the magnets so that the mounting strips are ...
Magnets have two poles, called north and south. The like poles are attracted to unlike poles, but like poles repel each other. For example, the north pole of one magnet is attracted to the south pole of another. Magnets have a force or magnetic field tha
答案是:Permanent magnets are objects that produce their own persistent magnetic fields.All permanent magnets have both a north and a south pole.Regular pins are not attracted by the door of the refrigerator but are attracted by fridge magnet. 3.在某一瞬间,一个媒介,例如,一条绳子,是平的.是不...
Due to the pre-determined spacing of the magnet assemblies on the mandrel 12, the magnetic field created by adjacent magnets overlaps the areas 46, 48, causing metal debris to settle on the exterior of the spacers 46 and 48, as well. As can be seen in the drawings, each of the ...
Axisymmetric magnetic lines of nanometer sizes (chiral vortices or skyrmions) have been predicted to exist in a large group of noncentrosymmetric crystals more than two decades ago. Recently these magnetic textures have been directly observed in nanolayers of cubic helimagnets and monolayers of magnetic...
Overall, magnetic fluid-based separation technology makes use of the dual properties of fluids and magnets, which is more environmentally friendly and energy efficient than the traditional magnetic separation technique; it is often more efficient for objects that are difficult to treat (e.g., stable...
However, existing actuation methods relying on a single magnetic source,such as permanent magnets or electromagnets, suffer from an imbalance between flexible regulation andlow energy operation." 展开 关键词: Wuhan People’s Republic of China Asia Applied Materials Materials Research Electromagnet ...