The refrigerant pressure inside an r-410a unit which is at room temperature (72 degrees f) and not operating is

What is the foundation for proper monitoring, load balancing and routing in distributed systems

Which database model is best used for data warehouse and data mining

Why were most movies from the late 1890s until the early 1930s only filmed in black and white? there were only a few people who could afford the technology to produce color motion pictures back then. audiences did not want color motion pictures until later. the film used to make color motion pictures often overheated, which was a safety hazard, so it was generally not allowed. color films had to be hand-colored, frame by frame.