[Solved] At what temperature does argon have a root mean square velocity of 492 m s<sup>-1</sup>? A) 321 K B) 291 K C) 340 K D) 388 K E) 409 K Colonoscope: A thin, flexible tube equipped with a camera and light at the end, used to examine the inside of the colon. Proctoscope: A medical instrument designed for the visual examination of the rectum. Valsalva Maneuver: A technique where one attempts to exhale forcefully with a closed mouth and pinched nose, used in medical examinations. Occult Blood: Blood present in such small quantities that it is not visible to the naked eye, often detected through specific tests.