What is the solution to the solar neutrino problem?
A) The Sun is generating energy other than by nuclear fusion.
B) The Sun is generating much less energy than we think it is.
C) We do not know how to detect electron neutrinos.
D) Not all fusion reactions create electron neutrinos.
E) The electron neutrinos created in the Sun change into another type of neutrino that we could not detect with our original equipment.
E
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A 2 000-kg sailboat experiences an eastward force of 4 500 N by the ocean tide and a wind force against its sails with magnitude of 1 500 N directed toward the northwest (45° N of W). What is the direction of the resultant acceleration?
a. 27° N of W b. 58° N of W c. 27° N of E d. 17° N of W e. 17° N of E
A race car circles 10 times around an 8-km track in 20 min. What is its average speed per lap?
What will be an ideal response?
Why are reflection nebulae blue in color?
What will be an ideal response?
In a circuit powered by a battery, charge
A) flows through the battery. B) is energized by the battery. C) both of these D) neither of these