The structure of black hole jets is believed to be controlled by magnetism
a. True
b. False
Indicate whether the statement is true or false
True
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A steel bar of rectangular cross section (a 5 38 mm, b 5 50 mm) carries a tensile load P. The allowable stresses in tension and shear are 100 MPa and 48 MPa, respectively. The maximum permissible load Pmax is approximately:
(A) 56 kN
(B) 62 kN
(C) 74 kN
(D) 91 kN
Process of Science: Why do we think the source of Jupiter's large internal energy come from gravitational contraction?
What will be an ideal response?
Charge in an Electric Field: A small object with a 5.0-?C charge is accelerating horizontally on a friction-free surface at 0.0050 m/s2 due only to an electric field. If the object has a mass of 2.0 g, what is the magnitude of the electric field?
A. 2.0 N/C B. 4.0 N/C C. 0.0020 N/C D. 0.0040 N/C E. 1.0 N/C
Briefly describe how an impact could lead to a mass extinction
What will be an ideal response?