磁力及重力方面的問題

1. 請問磁力或有咩可以遮斷重力嗎？ 要有多大先可以做到？什么都不可能阻攔重力，包括磁场。 实际上，有本身的任何許多同事一個引力场。

2. 用電產生的磁力發生過程會對電力有損耗嗎？ 損耗有多大？ 有公式可以計嗎？ Mangetic領域同移動的充電联系在一起，像與大量的一個對象將安排graviational領域与它交往。 由电流的功率损失是克服潮流流動纜繩的抵抗。

3. 磁力會對生物做成損害或其他影響嗎？當前科学仍然未證實任何永久傷害，當暴露在非常強烈的靜態磁场。 国际标准允許公众的暴露對γ通量密度400 mT (即1百万倍的靜態領域地球的磁场)。 在深刻缺乏曝光，例如接受磁反應想像(MRI)做法的患者，對靜態磁場的暴露可以2 T~8 T。 因為有在血液的當前分鐘在一些身體器官(例如調控心臟的拍打)的那些和離子，在一個強的靜態磁场之下的曝光影響這些身體潮流，也許導致不規則的心跳，或者影響血流，導致臨時高血压、眩暈、金属味噁心、輕的閃光的感覺或preception。

1. 請問磁力 or 有咩可以遮斷重力嗎? 要有多大先可以做到?
Nothing can block gravity, including magnetic field. In fact, any mass associate with itself a gravitational field.

2. 用電產生的磁力發生過程會對電力有損耗嗎? 損耗有多大? 有公式可以計嗎?
Mangetic field is associated with a moving charge, just like an object with mass would have a graviational field associated with it. The power loss by the electric current is to overcome the resistance of the cable along which the current flows.

3. 磁力會對生物做成損害or其他影響嗎?
Present scientific knowledge has still not confirmed any permanent injury when exposed to very intense static magnetic field. International standard permits exposure of the general public to static field of flux density 400 mT (i.e. 1 million times the magnetic field of the earth). In acute short exposure, such as patients undergoing Magnetic Resonance Imaging (MRI) procedures, exposure to static magnetic fields may up to 2 T~8 T.

Since there are minutes current in some body organs (such as those regulating the beating of the heart), and ions in blood streams, exposures under a strong static magnetic field affect these body currents, which may cause irregular heart beats, or affect the flow of blood, causing temporary high blood pressure, vertigo, nausea, sense of metalic taste or preception of light flashes.