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9 Cards in this Set
- Front
- Back
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For a black body radiator, the frequency at which maximum radiation of energy occurs is proportional to ___________? |
Temperature. frequency is proportional to absolute temperature. λmaxT = 2.898e-3, so λ ∝ 1/T. f = 1/ λ therefore f ∝ T |
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Is kinetic energy conserved in a fission reactor? explain |
No, The KE gained by the particles is lost as heat in order to heat up the water to continue the generator. so because energy is lost through heat, KE is not conserved so the collisions are inelastic. |
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A mass-spring system oscillating at 3.0Hz on the surface of earth is moved to a region of space where the gravitational field strength is a third of that on the earths surface. what is it's new frequency? |
3.0Hz, the time period/frequency of a mass spring system is independent of the gravitational field strength. (varies with spring constant and mass) |
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Define a Forced Oscillation |
An oscillation in which external forces are regularly/periodically applied to the system in order to continue the oscillation |
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define a Free Oscillation |
An oscillation in which no external forces are applied following the initial displacement |
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Give 7 examples of background radiation sources. |
Living matter, Dead matter, Rocks (Radon gas), Food/drink, Cosmic Rays, Medical, Buildings |
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When a forced oscillation is damped, what can be said about the amplitude? |
The amplitude is reduced to a constantly lower value. (i.e amplitude remains the same with each oscillation but is lower than the undamped amplitude) |
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State Boyle's Law and the conditions necessary for it to apply |
PV = 'k', Requires a fixed mass of gas at a constant temperature, where the number of molecules in the gas don't change. |
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A sealed jar contains a mixture of different gasses, for a given temperature, what can be said about the mean kinetic energy of the molecules of each gas? |
They are the same, 1/2m<c^2>=3/2kT so at a given temperature the mean kinetic energy of molecules will be the same (it is the mean square speed that varies with mass) |
