Explain the large-impact hypothesis
What will be an ideal response?
The large-impact hypothesis proposes that the Moon formed when an object estimated to have been at least as large as Mars smashed into the proto-Earth. Model calculations indicate that this collision would have ejected a disk of debris into orbit around Earth and that the debris could have quickly formed the Moon.
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The characteristic that distinguishes schist from slate is that schist is
A) foliated and slate is not. B) fine-grained and slate is coarse-grained. C) coarse-grained and slate is fine-grained. D) not foliated and slate is foliated.
Multiple-Object Accelerating Systems: Two boxes, A and B, are connected by a horizontal string S on a horizontal floor. A very light wire pulls horizontally on box B, as shown in the figure, with a force of 100 N. The reaction force to this pull is
A. the pull that box B exerts on string S. B. the pull that string S exerts on box B. C. the pull that string S exerts on box A. D. the pull of box B on the wire. E. the force that box A exerts on box B.
Synchrotron radiation produces a(n) ________ spectrum
A) continuous nonthermal B) emission line C) absorption line D) continuous, with some absorption lines E) continuous, with some emission lines
A 2.0-kg ball moving eastward at 3.0 m/s suddenly collides with and sticks to a 4.0-kg ball moving northward at 2.0 m/s. What is the magnitude of the momentum of this system just after the collision?
A) 10 kg ? m/s B) 6.0 kg ? m/s C) 8.0 kg ? m/s D) 2.0 kg ? m/s E) 14 kg ? m/s