The following points are given:

x 1 2.2 3.7 6.4 9 11.5 14.2 17.8 20.5 23.2
y 12 9 6.6 5.5 7.2 9.2 9.6 8.5 6.5 2.2

(a) Fit the data with a first-order polynomial. Make a plot of the points and the polynomial.
(b) Fit the data with a second-order polynomial. Make a plot of the points and the polynomial.
(c) Fit the data with a third-order polynomial. Make a plot of the points and the polynomial.
(d) Fit the data with a fifth-order polynomial. Make a plot of the points and the polynomial.

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.

The higher the astm grain size number, the finer the gran is. a)-true b)-false

Compute the pressure drop of 30°c air flowing with a mean velocity of 8 m/s in a circular sheet-metal duct 300 mm in diameter and 15 m long. use a friction factor, f 0.02, and pair = 1.1644 kg/m a. 37.26 pa b. 25.27 pa n c. 29.34 pa d. 30.52 pa