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The resistance of the platinum wire of a platinum resistance thermometer at the ice point is And at the steam point is When the thermometer is inserted in a hot bath, the resistance of the platinum wire is Calculate the temperature of the bath.
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86. What is the mass of 4.91 X 1021 platinum atoms?
The work function for platinum is 6.35 eV.
(a) Convert the value of the work function from electron volts to joules. J(b) Find the cutoff frequency for platinum. Hz(c) What maximum wavelength of light incident on platinum releases photoelectrons from the platinum's surface? nm(d) If light of energy 8.02 eV is incident on platinum, what is the maximum kinetic energy of the ejected photoelectrons? Give the answer in electron volts. eV(e) For photons of energy 8.02 eV, what stopping potential would be required to arrest the current of photoelectrons? V
