What building material is the most energy efficient?

What do you mean by multithreaded program Explain the life cycle of a thread? What is a Vernier Height Gauge? Which type of media is typically used for large data backups? What year was the measuring pipette invented? What font is fablehaven written in? What do HTML tags mean? Why does the boiler flame turns off? What are the advantages of the cad drawing system over the manual drawing board system related to architectural work? What are the problems with a sankey diagram? What does asterisk do in python? How do you remove a program from the all programs menu? What is senescent phase? What VB Script keyword is used to formally declare a variable used by the script before trying to use it? Common collector amplifier does not have voltage gain but still provide power gain? How are the keywords struct and class different? Is the telltale factor for ascertaining where faults in a cable lie? What is critical speed of pump? Two key areas of renaissance technological innovation were? What actions would be required if the safety valve was popping and the steam pressure indicated 30 psi on the boiler? What is accuracy class in current transformer?