A steel hanger with solid cross section has horizontal force P 5 5.5 kN applied at free end D. Dimension variable b 5 175 mm and allowable normal stress is 150 MPa. Neglect self-weight of the hanger. The required diameter of the hanger is approximately:
(A) 5 cm
(B) 7 cm
(C) 10 cm
(D) 13 cm
(A) 5 cm
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Uniform Circular Motion: Pulling out of a dive, the pilot of an airplane guides his plane into a vertical circle. At the bottom of the dive, the speed of the airplane is 320 m/s. What is the smallest radius allowable for the vertical circle if the pilot's apparent weight is not to exceed 7.0 times his true weight?
A. 1700 m B. 1500 m C. 2200 m D. 230 m E. 42 m
Where in the Sun do fusion reactions happen?
A) core and radiation zone B) only the core C) everywhere inside the Sun
If an astronaut landed on a planet composed of antimatter, there would be an explosion and the
A) planet would annihilate. B) astronaut would annihilate. C) astronaut and an equal amount of planet antimatter would both annihilate.
A particle moves at a constant speed in a circular path with a radius of 2.06 cm. If the particle makes four revolutions each second, what is the magnitude of its acceleration?
a. 20 m/s2 b. 18 m/s2 c. 13 m/s2 d. 15 m/s2 e. 24 m/s2