Geocentric datum
What will be an ideal response?
A geocentric datum specifies the center of the Earth at the Earth’s center of mass.
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El componente que controla la aplicación de la energía del motor al sistema hidráulico en la zanjadora es el/la:
a. control de cadena de excavación. b. palanca del acelerador. c. embrague ("clutch") de la bomba. d. control de bloqueo del eje.
If a drive gear is required to rotate a driven gear in the same direction of rotation, which of the following is a requirement?
A. drive gear must be larger in diameter than the driven gear B. drive gear must double the number of teeth on the driven gear C. idler gear is required between the drive and driven gears D. two tooth-meshed gears always turn in the same direction
Design a Butterworth bandstop filter with the following specifications:
Lower passband cutoff frequency = f1 = 1125 Hz Lower stopband cutoff frequency = f2 = 2455 Hz Upper stopband cutoff frequency = f3 = 3055 Hz Upper passband cutoff frequency = f4 = 4255 Hz Maximum attenuation in the passband (dB) = Ap = 0.87 dB Minimum attenuation in the stopband (dB) = As = 4.37 dB excess='pass' km = 1000 (a) Find ?1, ?2, ?3, ?4, ?s, and order n. (b) Find the recalculated values of Ap1, As1, ?, ?c. (c) Find the poles S and zeros SZ of the normalized lowpass filter before multiplication by ?c. (d) Find the transfer function of the frequency transformed bandstop filter and find Q values and ?0 values of the second-order sections. (e) Find the normalized component values for Sallen-Key circuit for each second-order section. (f) Find the scaled component values for Sallen-Key circuit for each second-order section.
Problem 1.27 For the assembly and loading of Prob. 1.7, determine (a) the average shearing stress in the pin at B, (b) the average bearing stress at B in member BD, (c) the average bearing stress at B in member ABC, knowing that this member has a 10 × 50-mm uniform rectangular cross section. Problem 1.7 Each of the four vertical links has an 8 × 36-mm uniform rectangu¬lar cross section, and each of the four pins has a 16-mm diameter. Determine the maximum value of the average normal stress in the links connecting (a) points B and D, (b) points C and E.
