Which of the following is an example of Heisenberg's uncertainty principle?
A) The unpredictability of radioactive decay.
B) The unpredictability of a coin toss.
C) Both of the above.
D) The unpredictability of the weather.
E) All of the above.
A
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You live at a latitude of 39° S. What is the angle between the southern horizon and the south celestial pole?
a. 45° b. 23.5° c. 39° d. 51° e. The answer depends on the day of the year.
What happens to the core of a star if gravity is strong enough to overcome neutron degeneracy pressure?
A) The core contracts and becomes a white dwarf. B) The core contracts and becomes a ball of neutrons. C) The core contracts and becomes a black hole. D) The star explodes violently, leaving nothing behind. E) Gravity is not able to overcome neutron degeneracy pressure.
When the Sun is on the meridian, it is by definition ______________ local solar time
Fill in the blank(s) with correct word
A thin double convex lens is to focus the image of an object onto a screen so that the image is life-sized. The lens surfaces have equal radii of curvature of 112 cm, and the refractive index of the lens material is 1.500
(a) How far from the lens should the screen be placed? (b) How far is the screen from the object?