Consider the negative pion, ?-
(a) What combination of up and down quarks makes up this particle?
(b) Is the ?- a baryon or a meson?
(c) Is the ?- a lepton or a hadron?
What will be an ideal response?
(a) d (b) meson (c) hadron
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Convection in the mantle is caused primarily by
A) heat moving from the crust to the core. B) conduction. C) gravity and temperature differences. D) friction of overlying lithosphere.
A rock is thrown at some angle above the horizontal with a certain velocity. It reaches its highest point and starts falling down. What is the velocity of the rock at the highest point of its trajectory?
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