What is the quark structure of a neutron?
a. uud
b. udd
c. uuu
d. ddd
e. the question does not make sense
b
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From a latitude of 60ºN during the winter, the Sun will
A) spend most of each day below the horizon. B) spend most of each day above the horizon. C) never be seen above the horizon. D) spend a few weeks continuously below the horizon.
A 1000-kg automobile moving with a speed of 24 m/s relative to the road collides with a 500-kg automobile initially at rest. If the two stick together, what is the velocity in m/s of the two cars after the collision according to an observer in a truck moving 10 m/s in the same direction as the moving cars?
a. 6 b. 11 c. 24 d. 26 e. 31
In recent reports,(315-320,324) overfishing is cited as a cause for species' numerical collapse and possible forthcoming extinction. In b. and c., explain the parallelism or lack of parallelism with fishery management. a. What does this imply about human management of fishery resources? Cite specificinstances and consequences
b. Consider, for example, politicians dealing with mining. c. Consider, for example, politicians dealing with forestry.
The relativistic effect of time dilation has been verified by which of the following?
a. twin experiments c. muon experiments b. red shift in distant galaxies d. the discovery of black holes