Physics, 16.07.2019 20:50 kinqlouiee2253
One of the waste products of a nuclear reactor is plutonium–239 (239pu). this nucleus is radioactive and decays by splitting into a helium-4 nucleus and a uranium-235 nucleus (4he + 235u), the latter of which is also radioactive and will itself decay some time later. the energy emitted in the plutonium decay is 8.40 ✕ 10^−13 j and is entirely converted to kinetic energy of the helium and uranium nuclei. the mass of the helium nucleus is 6.68 ✕ 10^−27 kg, while that of the uranium is 3.92 ✕ 10^−25 kg (note that the ratio of the masses is 4 to 235).
a. calculate the velocities of the two nuclei, assuming the plutonium nucleus is originally at rest. (enter the magnitude of the velocities in m/s.)
b. how much kinetic energy in joules does each nucleus carry away? note that the data given here are accurate to three digits only.
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As part of your daily workout, you lie on your back and push with your feet against a platform attached to two stiff springs arranged side by side so that they are parallel to each other. when you push the platform, you compress the springs. you do an amount of work of 79.0 j when you compress the springs a distance of 0.230 m from their uncompressed length. (a) what magnitude of force must you apply to hold the platform in this position? (b)how much additional work must you do to move the platform a distance 0.230 m farther? (c) what maximum force must you apply to move the platform a distance 0.230 m farther?
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One of the waste products of a nuclear reactor is plutonium–239 (239pu). this nucleus is radioactive...
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