Physics, 26.06.2019 19:50 whitethunder05
Ernest rutherford (the first new zealander to be awarded the nobel prize in chemistry) demonstrated that nuclei were very small and dense by scattering helium-4 nuclei from gold-197 nuclei. the energy of the incoming helium nucleus was 8.00\times 10^{-13}~\text{j}8.00Γ10 β13 j, and the masses of the helium and gold nuclei were 6.68\times 10^{-27}~\text{kg}6.68Γ10 β27 kg and 3.29\times 10^{-25}~\text{kg}3.29Γ10 β25 kg, respectively (note that their mass ratio is 4 to 197). if a helium nucleus scatters to an angle of 120^\circ120 β during an elastic collision with a gold nucleus, what is the final kinetic energy of the helium nucleus?
Answers: 3
Physics, 22.06.2019 06:10
Africtionless piston-cylinder contains 50 l of saturated liquid r-134a. the piston has a mass and an area resulting in an applied pressure of 500 kpa on the refrigerant. the refrigerant is now heated until its temperature rises to 70βc. calculate the work (in kj) done during this process.
Answers: 3
Physics, 22.06.2019 06:30
At very high pressures, gases become and will eventually a) more dense; become hotter b) more dense; change to a liquid or solid c) less dense; combust d) less dense; turn into a liquid
Answers: 2
Physics, 22.06.2019 14:30
Alandscaper is shopping for landscaping materials. she wants to use materials through which water flows easily. which materials should she choose? check all that apply. clay gravel granite rocks with cracks loosely packed soil
Answers: 2
Ernest rutherford (the first new zealander to be awarded the nobel prize in chemistry) demonstrated...
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