Does hot water flow faster than cold? Molecules in a liquid have enough energy to move around and pass each other. Warm water has more energy than cold water, which means that molecules in warm water move faster than molecules in cold water. Does water move slower when cold? The molecules of cold water are […]
Should you put plastic behind insulation?
Should you put plastic behind insulation? Without a vapor barrier in place, condensation inside the walls could ruin the insulation and promote the growth of harmful mold and bacteria. Plastic, specifically 6-mil polyethylene plastic, is the most commonly used vapor barrier. Should you put plastic over insulation before drywall? Without poly beneath the drywall, water […]
Is the atomic number the number of electrons?
Is the atomic number the number of electrons? The atomic number uniquely identifies a chemical element. It is identical to the charge number of the nucleus. In an uncharged atom, the atomic number is also equal to the number of electrons. The sum of the atomic number Z and the number of neutrons N gives […]
Can you use an electric motor as a generator?
Can you use an electric motor as a generator? Always use caution when working with electricity. Your permanent magnet electric motor can be used as a generator. All that needs to be done is to apply an external power source to spin the shaft of any permanent magnet electric motor and your motor becomes a […]
What keeps the sun from exploding?
What keeps the sun from exploding? The inward pressure that keeps a star from exploding is the gravitational attraction of the gas mantle surrounding the core (which is most of the volume of the Sun, and is very hot but does not burn itself). Why does the sun not explode like a hydrogen bomb? The […]
What is honesty with example?
What is honesty with example? The definition of honest is someone or something that is truthful, trustworthy or genuine. An example of honest is someone telling their friend that a meal they prepared had too much salt. An example of honest is a student admitting they cheated on a test. Honest weight. What three things […]
What is the relation between charge and mass?
What is the relation between charge and mass? The charge-to-mass ratio (Q/m) of an object is, as its name implies, the charge of an object divided by the mass of the same object. This quantity is generally useful only for objects that may be treated as particles. Why does oxygen need 2 electrons? Oxygen needs […]
What is full form of SI unit?
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Why is potential energy negative in an atom?
Why is potential energy negative in an atom? When a stable atom is formed, the electron is attracted to the nucleus, r is less than infinity, and the energy will be negative. A negative value for the energy implies that energy must be supplied to the system if the electron is to overcome the attractive […]