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Card 16
Front
Why does the rate of heat production of an RTG decrease during its lifetime?
Back
Card 17
Front
Calculate the efficiency of the production of energy in one of Cassini's RTGs at launch.
Back
Card 18
Front
Use the half life of Pu-238 to estimate the decrease in power output of an RTG during the 11-year lifetime of the Cassini project.
Back
Card 19
Front
The plutonium oxide fuel in an RTG is in ceramic form. What are the properties of ceramics?
Back
Card 20
Front
Why do the properties of ceramics mean there is less chance of human casulaties if there is an accident during the launch of a spacecraft?
Back
Card 21
Front
Estimate the mass of plutonium-238 in each 10.9kg block of fuel. (1 eV = 1.6 x 10^-19 J, Avogadro constant Na = 6.02 x 10^23 / mol)
Back
Card 22
Front
How do thermocouple junctions work?
Back
Card 23
Front
What other than temperature affects emf induced in a thermocouple?
Back
Card 24
Front
Why can larger volatages be generated by RTGs in space than in terrestrial applications?
Back
Card 25
Front
Calculate the orbital speed of a satellite with an electrodynamic tether at the same orbital radius as the Hubble Space Telescope.
Back
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