What is the difference between logical and physical data? Logical data models are defined in terms of entities, attributes, and relationships. They reflect the business, its information and rules. A physical data model represents the computer database. Physical models look at data files and database design in terms of their implementation. What is logical data […]
What are some of the benefits of global airline travel?
What are some of the benefits of global airline travel? Savvy travelers favor air travel because it’s faster and less accident prone than other methods of travel. Air travelers can reach most domestic destinations in hours; international travel seldom takes more than 24 hours. Travel also benefits the economy, as well as additional aid to […]
What color is light that has a wavelength of 600 nm?
What color is light that has a wavelength of 600 nm? Orange Does a 700 nm photon have more or less energy than a 400 nm photon? Similarly, a photon of red light (wavelength lambda = 700 nm) has less energy than a photon of violet light (wavelength lambda = 400 nm)…. http://docs.kde.org/ Prev The […]
What are the main components of a comfortable and healthy building environment?
What are the main components of a comfortable and healthy building environment? The following components were included: healthy, sustainable air; healthy, sustainable thermal control; healthy, sustainable light; workplace ergonomics and environmental quality; access to the natural environment; and. land use and transportation. What is needed to be considered a LEED construction project? LEED Certification Minimum […]
What is the 6 disconnect rule?
What is the 6 disconnect rule? The rule is six disconnecting means for each service, not six service disconnecting means per building. If the building has two services, you can have a total of 12 service disconnects (six disconnects per service). What does service disconnect mean? Electrical disconnects are switches that isolate all wiring in […]
Is it better to sleep in silence or with noise?
Is it better to sleep in silence or with noise? No, really. While it may seem a little hard to believe, perfect silence can keep some people from dropping off and enjoying a good night’s sleep. Sounds of this sort work by creating a level of steady, consistent background noise that can help to mask […]
What is ideal voltage source and ideal current source?
What is ideal voltage source and ideal current source? An ideal voltage source provides no energy when it is loaded by an open circuit (i.e. an infinite impedance), but approaches infinite energy and current when the load resistance approaches zero (a short circuit). An ideal current source has an infinite output impedance in parallel with […]
What are the graduations on the sleeve of a metric micrometer?
What are the graduations on the sleeve of a metric micrometer? The thimble has 50 graduations, each being 0.01 millimetre (one-hundredth of a millimetre). Thus, the reading is given by the number of millimetre divisions visible on the scale of the sleeve plus the particular division on the thimble which coincides with the axial line […]
What are the magnetic properties of materials?
What are the magnetic properties of materials? 5 Magnetic Properties of Materials Property 1: Intensity of magnetisation (I) Property 2: Magnetic Field (H) or Magnetic intensity. Property 3: Magnetic susceptibility. Property 5: Coercivity. What are domains in magnetic materials? A domain is a region inside of a material where groups of magnetic moments naturally align […]