... This is a very simplified explanation, mistakes are (mostly) intentional. Radiation can be separated into two categories: ionizing radiation and non-ionizing radiation. In layman’s terms, ionizing radiation is radiation that can “break” the molecules that make up things. Non-ionizing radiatio...
...的问答网站分组。 问题 超级用户读者Bob Freaking想知道散热器的颜色是否重要: I know that heatsinks come in different fin forms and those different fin forms affect the way how they dissipate heat. However, there’s something I could not get about them and it’s their ...
...目地干扰你的Wi-Fi信号。请继续阅读,我们将探讨微波炉如何对您的无线网络造成严重破坏。 今天的问答环节是由SuperUser提供的,SuperUser是Stack Exchange的一个分支,是一个由社区驱动的问答网站分组。 问题 超级用户读者Ohlin想...
...。 Positron-Electron Tomography (PET) scanning also makes use of nuclear radiation. Here, molecules containing atoms that undergo decay is introduced into the body. The particles are positr*** ( ) and they annihilate when they come into contact with electr*** ( ). The annihilation produces a...
...约每年20毫米。 Convection in the Earth’s Mantle 强制对流 当使用外部机制(如使用风扇或泵)移动材料时,会发生强制对流。风扇加热器是强制对流的一个很好的例子。在人体内,心脏也起着泵的作用,负责身体周围的强制对流热...
...被用来消毒物体。 辐射(radiation)和辐照(irradiation)的区别 使用 辐射具有广泛的含义,涵盖了传递能量的不同情况,包括电磁辐射和核辐射。 辐照特指物体暴露于辐射中的过程。 工具书类 布伦南,C。第(1995年3月)。关于食物...
...些可能对过程有很多了解的人。CAT扫描是处理领域的个人使用的技术术语。 两种扫描都有一个相同的工作过程,扫描仪通过一系列穿过人体的光束发射辐射,并呈弧形移动。数据被收集起来,然后传输到一台计算机上,在计算...
...uction) vs. 对流(convection)传导、对流和辐射之间的区别在于如何将热量从动能较高的区域转移到动能较低的区域。在传导中,这是通过两个物体之间的直接物理接触来实现的。另一方面,当热量通过分子运动传递时,就会发生对流...
...at food and other materials. Sources Cosmic microwave background radiation is a natural source of microwaves. The radiation is studied to help scientists understand the Big Bang. Stars, including the Sun, are natural microwave sources. Under the right conditions, atoms and molecules can em...
...gamma-electric cell for producing a high-output voltage from a source of radiation wherein the gamma-electric cell includes a central collector constructed of a dense metal with the central collector encapsulated within an outer layer of dielectric material. A further conductive layer is then dis...