1 He 2  ... spectrum-spectrum spectrum, arrangement or display of light or other form of radiation separated according 3  ... atomic mass-atomic mass atomic mass, the mass of a single atom, usually expressed in atomic mass units (amu). ...he radius of this path depends upon the mass of the particles (all other factors, such as velocity and charge, being equal). Thus, if in the original stream isotopes of various masses are present, the position of the blackened spots on the plate makes possible a calculation of the isotope masses.
Almost all electrical appliances come for a standard voltage. Depending where you live, this is usually about 110 volts in some areas, and about 220 volts in other areas. You can take a look at a specific appliance; there is usually a metallic sticker that has the electrical specifications.
An average size electric fireplace heater will run at 120 volts (standard), 1500 watts, and 12.5 amps. To determine the heating capacity that this fireplace would provide, you simply divide the number of watts (1500) by 10. This means a heater with those specs should adequately heat 150 square feet. You can of course, find electric fireplaces with lower and higher ranges, some that even offer as many as 4,500 BTUS to heat 450 square feet. Easy Installation. Thereâs very little to worry about when it comes to installation. All you really have to do is move them into position and plug in to your standard 120 volt wall outlet. Because âinstallationâ is so simple, you can easily move your fireplace from one room to another. This is perhaps one of the biggest pros of an electric fireplace over a natural gas fireplace.