A certified reference material is accompanied by a certificate, of whose property values are certified by a procedure which establishes traceability to an accurate realisation of the unit in which the property values are expressed, and for which each certified value is accompanied by an uncertainty at a stated level of confidence
When you asked your question, you asked a reference question. You are asking me for information. That is a reference question requesting information from me. I am your reference material to answer this particular question. For other types of research, you need different types of reference material. If you are doing research on how to find or make something, a good reference can show you how others have done the same thing and problems they have run across in the past. Using such material is called avoiding "Reinventing the wheel." If you are doing original research, you need to know what others have done in a similar vein. That way you can show why what you are doing is original.
The majority of radioactive material shipments are made in Type A packagings, which are designed to withstand mechanical and thermal stresses and provide a high level of safety during transport. These packagings are tested and certified to ensure they meet strict safety requirements set by regulatory agencies.
A lectern is used to support reading material or notes during a speech or presentation. It provides a platform for the speaker to place their materials at an appropriate height for easy reference while speaking to an audience.
When getting something as serious as surgery one should always make sure the person performing the surgery is fully and correctly certified to ensure one's own safety.
The object that serves as the reference point for determining motion is known as the frame of reference. It is used to describe the motion of an object relative to another object or observer. The choice of frame of reference can affect how motion is described and analyzed.
Reference materials
special reference material
Geologists reference a material's density in reference to it's weight. Density is the material's weight divided by the weight of an equal volume of water.
Geologists reference a material's density in reference to it's weight. Density is the material's weight divided by the weight of an equal volume of water.
Library/museum material and Reference or exhibit materials
Library/museum material and Reference or exhibit materials
Not in any of the reference material I have.
Non-record material
Reference or exhibit materials
Reference or exhibit materials
Special reference material is anything that gives background information about a specific topic. Some examples include almanacs, atlases, bibliographies, dictionaries, and encyclopedias.
Apparent relative density is a measure of the density of a material compared to the density of another reference material, typically water. It is calculated by dividing the apparent mass of the material by the mass of an equal volume of the reference material. Apparent relative density does not take into account the presence of any voids or pores in the material.