1 Size-Tornadoes can vary widely in size. 2  A typical tornado in the United States is around 500 feet across, but some may be as narrow as just a few feet across or as large as a mile wide. 3  Wind Speed-The wind speed of a tornado can vary from 65 to 250 miles per hour.
It is always used in conjunction with a means to determine at what pressure blood flow is just starting, and at what pressure it is unimpeded. Manual sphygmomanometers are used in conjunction with a stethoscope. The word comes from the Greek ÏÏÏÎ³Î¼ÏÏ (sphygmos, pulse), plus the scientific term manometer (pressure meter).
A voltmeter is an instrument that is used to measure the voltage between two points in a circuit. The early voltmeters were based on moving coil galvanometers and were created by inserting a resistor in series with the instrument.It uses a small coil of fine wire suspended in a strong magnetic field.ultimeters can also be utilized in place of both ammeters and voltmeters. A multimeter is an instrument that can be used to measure both, currents as well as voltages. It can also perform as ohmmeters, a device used to measure resistance. Multimeters are available in analog or digital format. Ammeter.