A drive shaft resists torsional shear stress of 45 MPa and axial compressive stress of 100 MPa. The maxi- mum shear stress is approximately:
(A) 42 MPa
(B) 67 MPa
(C) 71 MPa
(D) 93 MPa
(B) 67 MPa
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Consider a high-speed bus colliding head-on with an innocent bug. The force of impact splatters the unfortunate bug over the windshield. Which is greater, the force on the bug or the force on the bus?
A. Bug B. Bus C. Both are the same. D. Cannot say
Uranus' rotation axis is tipped over 98 degrees, so its magnetosphere is tipped over the same amount
Indicate whether the statement is true or false
Which of the following is not a conserved quantity?
A) energy B) momentum C) angular momentum D) radiation
All of the following are true. Which of the following is Not a consequence of precession of the Earth's spin axis?
a) the path that the earth orbits in a slightly elliptical b)which star is called the North Star changes in time c) the instant of the Vernal equinox occurs 20 minutes earlier each year