A cast iron pipe (L 5 12 m, weight density 5 72 kN/m3, d2 5 100 mm, and d1 5 75 mm) is lifted by a hoist. The lift points are 6 m apart. The maximum bending stress in the pipe is approximately:
(A) 28 MPa
(B) 33 MPa
(C) 47 MPa
(D) 59 MPa
(A) 28 MPa
You might also like to view...
Two long parallel wires carry currents of 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. What is the strength of the magnetic field midway between the two wires? (?0 = 4? × 10-7 T ? m/A)
A) 2.0 × 10-5 T B) 3.0 × 10-5 T C) 1.0 × 10-5 T D) 4.0 × 10-5 T E) 5.0 × 10-5 T
Series/Parallel Circuits: As more resistors are added in parallel across a constant voltage source, the power supplied by the source
A. increases. B. decreases. C. does not change. D. increases for a time and then starts to decrease.
Which of the following statements about parallax is not true?
A) The existence of stellar parallax is direct proof that Earth orbits the Sun. B) You can demonstrate parallax simply by holding up a finger and looking at it alternately from your left and right eyes. C) Ancient astronomers were unable to measure parallax and used the absence of observed parallax as an argument in favor of an Earth-centered universe. D) Measurement of stellar parallax allows us to determine distances to nearby stars. E) The technique of stellar parallax was used by Hubble to determine that the Andromeda Galaxy (M 31 ) is about 2 million light-years away.
If the Earth's North polar axis is always tilted 23.5 degrees toward the Sun, but the Earth is still rotating about this axis once each day:
A) it would always be winter in the Southern hemisphere B) it would always be summer in the Southern hemisphere C) the stars would never be visible from anywhere in the Northern hemisphere D) the stars would never be visible from anywhere in the Southern hemisphere E) the days would be longer in the Southern hemisphere