The electrical conductivity and the electron mobility for some metal at room temperature are 5.6 × 107 (ω-m)-1 and 0.0032 m 2/v-s, respectively. (a) compute the number of free electrons per cubic meter for this metal at room temperature. n= enter your answer for part (a) in accordance to the question statement m-3(b) what is the number of free electrons per aluminium atom? assume a density of 2.7 g/cm3.

The mass flow rate of the fluid remains constant in all steady flow process. a)- true b)- false

Ajournal bearing has a journal diameter of 3.250 in with a unilateral tolerance of 20.003 in. the bushing bore has a diameter of 3.256 in and a unilateral tolerance of 0.004 in. the bushing is 2.8 in long and supports a 700-lbf load. the journal speed is 900 rev/min. find the minimum oil film thickness and the maximum film pressure for both sae 20 and sae 20w-30 lubricants, for the tightest assembly if the operating film temperature is 160°f. a computer code is appropriate for solving this problem.

Which from the following instrument is commonly used to detect the high pitch butzing sound in bearings? [clo4] a)-digital ultrasonic meter b)-infrared camera c)-spectroscopic d)-vibrometer