What is the quark structure of an electron?
a. uud
b. udd
c. uuu
d. ddd
e. the question does not make sense
e
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__________is that component of an object's velocity that is directed away from or toward an observer
A) Parallel velocity B) Radial velocity C) Tangential velocity D) Identical velocity
Far from the Sun in a spherical cloud surrounding the solar system we find
A) Orion's belt B) the Oort cloud C) the asteroid belt D) the Kuiper cloud
The diagrams below show forces of magnitude F applied to an equilateral triangular block of uniform thickness. In which diagram(s) is(are) the block in equilibrium?
A. A B. B C. C D. D E. A and B
A satellite of mass m has an orbital period T when it is in a circular orbit of radius R around the earth. If the satellite instead had mass 4m, its orbital period would be
A) 4T. B) 2T. C) T. D) T/2. E) T/4.