The twisting of the axis of rotation combined with the rotation of an object causes _____
A) culmination
B) precession
C) conjunction
D) libration
B
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Develop a reasonable layout of nodes and control volumes for the geometry shown in the sketch. Provide a scale drawing showing the problem geometry overlaid with the nodes and control volumes.
GIVEN Two-dimensional transient conduction at an inside corner with specified-flux boundary condition FIND (a) The control volume energy balance equation,
Process of Science: How can we test hypotheses about something that is postulated to exist in the past but that no longer exists today, such as free-flowing water on Mars?
What will be an ideal response?
Why do we expect WIMPs to be distributed throughout galactic halos, rather than settled into a disk?
A) They are light enough that they have expanded out into the halo. B) WIMPs were produced at the early stages of galaxy evolution, and objects in the halo, such as globular clusters, were formed at the beginning of the galaxy. C) Since they do not interact with the electromagnetic force, they do not feel friction or drag and hence do not contract with the rest of the protogalactic cloud. D) Shock waves from supernovae have blown the WIMPs out into the halo. E) Jets from the early active stage of a galaxy's life shot out most of the WIMPs from the disk.
The freezing point of pure water is 0°C. Which of the following temperatures represents one that is double this based on an absolute temperature scale?
1.0°C 2.100°C 3.200°C 4.273.15°C