What is the quark structure of an electron?

a. uud
b. udd
c. uuu
d. ddd
e. the question does not make sense


e

Physics & Space Science

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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

Physics & Space Science

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.

Physics & Space Science

__________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

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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

Physics & Space Science