Discuss why it is impossible for a particle to decay into a single particle of less mass
What will be an ideal response?
Observe the decay from the rest frame of the original particle, in which momentum is obviously zero. If a single particle were created that has less mass, then some of the original mass became kinetic energy and the final particle would be moving and have momentum. But momentum must be conserved and the final can not have momentum.
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While the orbits of planets are nearly circular, the eccentricities of the orbits of ________ are near one
Fill in the blank(s) with correct word
According to models of galaxy formation, which population of stars formed first?
A.) The spheroidal population. B.) The disk population. C.) The irregular population. D.) The elliptical population. E.) All stars are about the same age.
A tropical storm becomes a hurricane when its wind speed reaches
a. 50 mi/h. b. 120 mi/h. c. 74 mi/h. d. 100 mi/h.
Compare the critical heat flux for a flat horizontal surface with that for a submerged horizontal wire of 3-mm-diameter in water at saturation temperature and pressure.
GIVEN
? Flat, horizontal surface and a submerged, horizontal wire
FIND
(a) Critical heat flux for both geometries
ASSUMPTIONS
? The water is at atmospheric pressure
PROPERTIES AND CONSTANTS
From Appendix 2, Table 13
