elutriation of fines from dome-collapse pyroclastic flows. Vulcanian explosions produced more fallout tephra in about five weeks in 1997 than did dome collapses in about one year from June 1996 to June 1997 (Bonadonna et al. 2002). However, the ash associated with dome-collapse pyroclastic flows seems to be more hazardous to health than Vulcanian tephra, as it contains more crystalline silica and is very fine-grained (Baxter et a/. 1999; Moore et al. 2002). Furthermore, large dome collapses also occurred once dome
That device is the sphygmomanometer, which is used to measure blood pressure. The sphygmomanometer has been in wide use since the early 20th century, and consists of a cuff placed around the arm, as well as a device to measure the pressure at which blood flows freely, and the pressure at which blood flow is restricted.he sphygmomanometer has been in wide use since the early 20th century, and consists of a cuff placed around the arm, as well as a device to measure the pressure at which blood flows freely, and the pressure at which blood flow is restricted.
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.