According to the standard model, there are some cases in which a quark and its anti-quark have the same
a. charge.
b. baryon number.
c. strangeness.
d. All of the above are always different.
c
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Superposition of waves can occur
A. in transverse waves. B. in longitudinal waves. C. in sinusoidal waves. D. in all of the above. E. only in (a) and (c) above.
The amount of radiation left over when all incoming and outgoing flows have been tallied is called __________.
What will be an ideal response?
A pinhole cameras has no lens. The tiny pin-hole opening insures that rays of light from different parts of an object
1) overlap. 2) don't overlap. 3) bend to a focus. Small openings between leaves in a tree act as pinholes. The round spots of light cast on the ground below are images of 4) the Sun. 5) the openings themselves. 6) both of these 7) neither of these
An object of mass m rests on a flat table. The earth pulls on this object with a force of magnitude mg. What is the reaction force to this pull?
A) The table pushing up on the object with force mg. B) The object pushing down on the table with force mg. C) The table pushing down on the floor with force mg. D) The object pulling upward on the Earth with force mg. E) The table pulling upward on the Earth with force mg.