State Heisenberg's Uncertainty Principle
What will be an ideal response?
The position and momentum of a particle cannot both be measured precisely at the same time.
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A major advantage of a Newtonian reflector over a refractor is:
A) its compact size. B) the elimination of chromatic aberration. C) there are only two lenses to grind. D) the central hole in the mirror is smaller. E) the elimination of the secondary mirror.
Notice that the parallax is greater (the apparent movement is larger) for the person than for the trees, and that the mountains do not appear to shift at all. Why?
A. The amount of parallax depends on an object's size, with greater parallax for larger objects. B. The amount of parallax depends on an object's size, with greater parallax for smaller objects. C. The amount of parallax depends on an object's distance, with greater parallax for more distant objects. D. The amount of parallax depends on an object's distance, with greater parallax for nearer objects.
What does Einstein's cosmological constant represent in his equations of general relativity?
A) the value of the expansion rate of the universe B) the value of the acceleration of the universe C) the value that measures the strength of gravity across the universe D) the size of the cosmological horizon E) a repulsive force that can counteract gravity
Plus and minus signs are used in one-dimensional motion to indicate direction. What is the sign of an acceleration that reduces the magnitude of a negative velocity? Of a positive velocity?
A. For negative velocity a positive acceleration will increase the magnitude of the velocity. For positive velocity a negative acceleration will reduce the magnitude of the velocity. B. For negative velocity a positive acceleration will reduce the magnitude of the velocity. For positive velocity a negative acceleration will reduce the magnitude of the velocity. C. For negative velocity a negative acceleration will reduce the magnitude of the velocity. For positive velocity a negative acceleration will reduce the magnitude of the velocity. 2. if an object is thrown straight up and air resistance is negligible, then (a) what will be its speed when it returns to the starting point on the ground? (b) If air resistance were not negligible, then how would the maximum height to which it rises be affected? a) The final return accelerati0on on the ground will be the same as the initial value. (b) The minimum height will be lower. b) The final return speed on the ground will not be the same as the initial speed. (b) The maximum height will be lower. c) The final return speed on the ground will be the same as the initial speed. (b) The maximum height will be lower.