We never find isolated, individual quarks because
A) quarks immediately undergo radioactive decay when they are separated.
B) quarks are bound tightly together by neutrinos.
C) quarks are always attached to electrons.
D) the force between quarks is infinitely strong so they cannot be budged.
E) whenever quarks are separated, the energy created by the separation creates new quark pairs.
E
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Calculate the speed at which a 0.723-kg object has the same momentum as a 1.30-kg object that is moving 0.515c
A) 0.734c B) 0.712c C) 0.981c D) 0.592c
1.65 billion is the same as
a. 1.65 × 10^12. b. 1.65 × 10^9. c. 1.65 × 10^6. d. 1.65 × 10^5. e. 1.65 × 10^3.
Assuming a linear velocity distribution and a linear temperature distribution in the boundary layer over a flat plate, derive a relation between the thermal and hydrodynamic boundary-layer thicknesses and the Prandtl number.
GIVEN
Boundary layer over a flat plate
FIND
A relation between the thermal and hydrodynamic boundary-layer thicknesses and the Prandtl number
ASSUMPTIONS
Linear velocity and temperature distributions in the boundary layers
SKETCH
Who was the first to propose solar system formation with gravity as a key component of the hypothesis?
a. Isaac Newton b. René Descartes c. Pierre-Simon de Laplace d. Georges-Louis de Buffon e. Emanuel Swedenborg