What purpose did the electrically charged plates have in the oil drop experiment? Millikan oil drop experiment: The purpose of Robert Millikan’s oil drop experiment (1909) was to measure the electric charge of the electron. He did this by carefully balancing the gravitational and electric forces on tiny charged droplets of oil suspended between parallel […]
What are the characteristics of complex adaptive systems?
What are the characteristics of complex adaptive systems? Complex Adaptive Systems are characterized by a high degree of adaptive capacity, giving them resilience in the face of perturbation. Other important properties are adaptation (or homeostasis), communication, cooperation, specialization, spatial and temporal organization, and reproduction. What is complex adaptive systems theory? Complex adaptive systems thinking is […]
At what height does wind stop?
At what height does wind stop? Except in mountainous regions, the effect of terrain features that cause local variations in wind extends usually no higher than about 2000 feet above the ground. How high can wind speeds in a tornado get? It is generally believed that tornadic wind speeds can be as high as 300 […]
What states require brakes on towed vehicles?
What states require brakes on towed vehicles? STATE Max Towed Vehicle Weight Or Stopping Distance w/o Brake Alabama 3000 lbs Alaska 5000 lbs Arizona 3000 lbs Arkansas 3000 lbs Do you need trailer brakes to pull a trailer? Trailer Brakes In California, brakes are required on any trailer coach or camp trailer having a gross […]
What is the significance of critical stress with respect to the structure of concrete?
What is the significance of critical stress with respect to the structure of concrete? Macroscopically, critical stress appears to be related to strengths of concrete under short-term, repetitive and long-time loading, and to fracture toughness, while microscopically, critical stress seems to indicate the beginning of significant slow crack growth. What is FC in reinforced concrete? […]
What does OSHA require of employers?
What does OSHA require of employers? The law requires employers to provide their employees with working conditions that are free of known dangers. The OSH Act created the Occupational Safety and Health Administration (OSHA), which sets and enforces protective workplace safety and health standards. What is the OSHA clause that requires an employer to furnish […]
What happens when you report a fraudulent transaction?
What happens when you report a fraudulent transaction? And reporting a charge as fraudulent when you know it isn’t, is an even worse plan of action. It wastes your time, the credit card company’s time, the merchant’s and sometimes even a consumer advocate’s. And if the merchant doesn’t answer within 30-days, the consumer will win […]
What are cold air standard assumptions?
What are cold air standard assumptions? These assumptions are: (1)The working fluid is air, which continuously circulates in a closed loop and always behaves as an ideal gas. (2)All the processes are internally reversible. (3)The combustion process is replaced by a heat addition process. (4)The exhaust process is replaced by a heat rejection process. What […]
What is lift and drag coefficient?
What is lift and drag coefficient? The lift to drag ratio (L/D) is the amount of lift generated by a wing or airfoil compared to its drag. The lift/drag ratio is used to express the relation between lift and drag and is determined by dividing the lift coefficient by the drag coefficient, CL/CD. Why does […]
Is a centrifugal pump self priming?
Is a centrifugal pump self priming? Most types of positive displacement pumps are self-priming but care must be taken to avoid overheating, seal wear or cavitation during the dry-running, priming phase. Centrifugal pumps can be modified to be self-priming with a surrounding ‘tank’ to retain some of the fluid. How is priming done in centrifugal […]