Athermocouple junction, which may be approximated as a sphere, is to be used for temperature measurement in a gas stream. the convection coefficient between the junction surface and the gas is h = 400 w/m2 k, and the junction thermophysical properties are k = 20 w/m. k, c = 400 j/kg .k, and =8500 kg/m3. determine the junction diameter needed for the thermocouple to have a time constant of 1 s. if the junction is at 25c and is placed in a gas stream that is at 200c, how long will it take for the junction to reach 199c?

Three archers each fire four arrows at a target. joe’s four arrows hit at points 10 cm above, 10 cm below, 10 cm to the left, and 10 cm to the right of the center of the target. all four of moe’s arrows hit within 1 cm of a point 20 cm from the center, and flo’s four arrows hit within 1 cm of the center. the contest judge says that one of the archers is precise but not accurate, another archer is accurate but not precise, and the third archer is both accurate and precise. which description applies to which archer? explain

Awave is produced in a rope. the wave has a speed of 33 m/s and a frequency of 22 hz. what wavelength is produced?

Awalk up the phase change graph worksheet