What is the glass transition temperature Tg of a polymer? The glass transition temperature is the temperature range where the polymer substrate changes from a rigid glassy material to a soft (not melted) material, and is usually measured in terms of the stiffness, or modulus. How do you determine the glass transition temperature of a […]
What determines the number of valence electrons?
What determines the number of valence electrons? For neutral atoms, the number of valence electrons is equal to the atom’s main group number. The main group number for an element can be found from its column on the periodic table. For example, carbon is in group 4 and has 4 valence electrons. Oxygen is in […]
What is spring stiffness?
What is spring stiffness? A ideal spring has an equilibrium length. It is a measure of the spring’s stiffness. When a spring is stretched or compressed, so that its length changes by an amount x from its equilibrium length, then it exerts a force F = -kx in a direction towards its equilibrium position. What […]
Can diesel knock damage the engine?
Can diesel knock damage the engine? Registered. Diesel knock can and will destroy your engine if left unchecked. Do diesel engines have knock sensors? Modern Diesels definitely have knock detection systems, but older Diesels have not- as others have answered on this question, knock is sort of a feature, not a problem in Diesel combustion. […]
What is 1 mm equal to in inches?
Is FCC more dense than BCC?
Is FCC more dense than BCC? Fig. 2 shows that in most cases bcc and fcc structures have similar densities, with bcc being slightly denser. Thus, the fcc → bcc transition is not an anomaly. Which packing is more efficient FCC or BCC? Both ccp and hcp are highly efficient lattice; in terms of packing. […]
What does an acoustic diffuser do?
What does an acoustic diffuser do? Diffusors (or diffusers) are used to treat sound aberrations, such as echoes, in rooms. They are an excellent alternative or complement to sound absorption because they do not remove sound energy, but can be used to effectively reduce distinct echoes and reflections while still leaving a live sounding space. […]
What should you do if you are exposed to potentially infectious materials?
What should you do if you are exposed to potentially infectious materials? Wash exposed skin, cuts, and needlestick injuries thoroughly with soap and water. If you have been splashed by potentially infectious fluids around the eyes, nose or mouth, flush the area with water. Immediately report the incident to emergency medical services. What should you […]
What is the Nspe code of ethics?
What is the Nspe code of ethics? NSPE Code of Ethics for Engineers. Engineers, in the fulfillment of their professional duties, shall: Hold paramount the safety, health, and welfare of the public. Perform services only in areas of their competence. Issue public statements only in an objective and truthful manner. What is Nspe? NSPE is […]
When should baseboards be installed?
When should baseboards be installed? Baseboard Installation Baseboards are often installed before flooring, since they must be finished in place with either stain or paint and this is much easier without worrying about staining the hardwood, tile or carpet. Cut the baseboard to the correct lengths using a handheld cutting tool. What are the 5 […]