What is the difference between 3 phase delta and 3 phase Wye? Delta systems have four wires total: three hot wires and one ground wire. Wye systems utilize a star configuration, with all three hot wires connected at a single neutral point. Wye systems, both measure 208VAC between any two hot wires, but 3-phase Wye […]
Is liquid limit a percentage?
Is liquid limit a percentage? 2.1 The liquid limit of a soil is the moisture content, expressed as a percentage of the weight of the oven-dried soil, at the boundary between the liquid and plastic states of consistency. What does a high liquid limit mean? A high liquid limit normally indicates a high compressibility and […]
How can artificial gravity be created in a space station?
How can artificial gravity be created in a space station? Artificial gravity can be created using a centripetal force. A centripetal force directed towards the center of the turn is required for any object to move in a circular path. In the context of a rotating space station it is the normal force provided by […]
What is the moment of inertia about Centroidal axis?
Which part of the body was used to define the length of a cubit?
How do you know if a flow is laminar or turbulent?
How do you know if a flow is laminar or turbulent? For practical purposes, if the Reynolds number is less than 2000, the flow is laminar. If it is greater than 3500, the flow is turbulent. Flows with Reynolds numbers between 2000 and 3500 are sometimes referred to as transitional flows. What is wide rectangular […]
What happened in the Old Stone Age?
What happened in the Old Stone Age? Lasting roughly 2.5 million years, the Stone Age ended around 5,000 years ago when humans in the Near East began working with metal and making tools and weapons from bronze. During the Stone Age, humans shared the planet with a number of now-extinct hominin relatives, including Neanderthals and […]
Which is the first phase of an incident and the Planning P?
Which is the first phase of an incident and the Planning P? 1. Initial Response, Objectives and Briefing: The leg of the “P” describes the initial response activation period for the Tier 1 Emergency Response Team (ERT), the Tier 2 Incident Management Team (IMT), and the Emergency Coordination Center (ECC) or Emergency Operations Center (EOC). […]
How many years will it take for an investment to double in value if it earns 5% compounded annually?
What is the efficiency at maximum power transfer condition?
What is the efficiency at maximum power transfer condition? The efficiency is only 50% when maximum power transfer is achieved, but approaches 100% as the load resistance approaches infinity, though the total power level tends towards zero. Efficiency also approaches 100% if the source resistance approaches zero, and 0% if the load resistance approaches zero. […]