A: Vocal problems, like polyps, are not restricted to singers. While singers require peak performance of their voice, other voice professionals, such as teachers, lawyers, clergy, salespeople and receptionists, are also at higher risk for many vocal cord problems.
The permissible operating temperature range of nitrile rubber is â40 to +100 Â°C (â40 to +210 Â°F). For brief periods, temperatures of up to 120 Â°C (250 Â°F) can be tolerated. SKF also offers a special nitrile rubber compound with a temperature range between â55 and +110 Â°C (â65 and +230 Â°F).
Using liquid nitrogen as the refrigerant, students will measure electrical resistance over a. temperature range from -196 Â°C (77 K) to room temperature, approximately 22 Â°C (295 K). Introduction to Research: In 1911, while investigating the conductivity of various metals at temperatures near the boiling. point of liquid helium (-269 Â°C, 4 K), H. Kamerlingh Onnes found that the electrical resistance. of mercury dropped to a value so small that it was indistinguishable from zero.