aThe eighth column lists examples of uses for this substance. They are not exhaustive and just provided as an indication. 第八个专栏列出用途实例为这种物质。 他们不是详尽和提供作为征兆。[translate]
Everything in the universe is made of matter, which can be described as any substance having mass and volume. The matter exists in three fundamental phases: gas, liquid, and solid. Apart from these, the matter can be either a pure substance or mixture. A pure substance is made up of on...
It is a compound that is made up of one sodium atom and one chlorine atom. It also has a uniform structure. What is a pure substance in chemistry? A pure substance is made up of one type of element or one type of compound. These substances also have a uniform structure to them with...
1.(Medicine)medan inactive substance or other sham form of therapy administered to a patient usually to compare its effects with those of a real drug or treatment, but sometimes for the psychological benefit to the patient through his believing he is receiving treatment. See alsocontrol group,pla...
aExamples abound of non-human persons: Christians believe that the Godhead consists of “three Persons of one substance”; U.S. Supreme Court justices have ruled that corporations are “artificial persons”; fans of Star Trek argue that androids like Data and aliens like Spock are all (...
But in some cases, there is no way to tell whether a baby’s positive test was caused by a medication the hospitaldispensedor a substance the mother used earlier. — Shoshana Walter,USA TODAY, 11 Dec. 2024 Some of these examples are programmatically compiled from various online sources to ...
Pollutionrefers to the presence of a substance or substances in the environment that are harmful or toxic. The substances or pollutants may be harmful to human health, other animals, and plants. When something harmful enters the environment at a faster rate than it can be dispersed, there is ...
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mis themassof a substance The most common types of constant-temperature processes arephase changes, such as melting, freezing, vaporization, or condensation. The energy is considered to be "latent" because it is essentially hidden within the molecules until the phase change occurs. It is "specific...