an optical fiber has an attenuation of 0.3 dB/km. if a laser launches an optical power level of Pin (microWallet) into 35 km length of this fiber, at what distances will the power have dropped to 75%

Inadequate stores control is not an obstacle to effective work order system. (clo4) a)-true b)-false

Asteam is contained in a rigid tank with a volume of 1 m3. initially, the pressure and temperature are 7 bar and 500 oc, respectively. the temperature drops due to cooling process. determine: (1) the temperature at which condensation begins in °c, (2) the fraction of the total mass that has condensed when the pressure decreased to 0.5 bar. (3) the volume in m3 occupied by saturated liquid at the final state?

The short distance from the objective lens to the object causes problems at high magnification. which of the following is the most serious? a. cleaning the object surface b. positioning the object c. reflection from the object surface. d. illumination of the object