An unstable particle produced in a high-energy collision is measured to have an energy of 483 MeV and an uncertainty in energy of 29 keV
Use the Heisenberg uncertainty principle to estimate the lifetime of this particle. (h = 6.626 × 10-34 J ? s, 1 eV = 1.60 × 10-19)
2.3 × 10-20 s
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The carbon-nitrogen-oxygen cycle
a. operates at a slightly lower temperature than the proton-proton chain. b. is most efficient in star less massive than the sun. c. occurs when carbon and oxygen combine to form nitrogen, which produces energy. d. produces the energy responsible for bipolar flows. e. combines four hydrogen nuclei to form one helium nucleus, which produces energy.
Which of the following is(are) classified as true chemical bonds?
a. hydrogen only b. ionic only c. covalent only d. both ionic and covalent e. hydrogen, ionic and covalent
The surface of Venus is hotter than the surface of Mercury
a. True b. False Indicate whether the statement is true or false
The red light from a HeNe laboratory laser results from a transition in Ne. Determine the wavelength of the light given off if the energy difference between states is 1.08 eV. (h = 6.63 × 10^?34 J?s, c = 3.00 × 10^8 m/s, 1 eV = 1.60 × 10^?19 J, and 1 nm = 10?9 m)
a. 383 nm b. 1840 nm c. 1150 nm d. 1340 nm e. 203 nm