URGENT)Which of the following best describes the work performed by a curator? promotion

preservation

restoration

examination

Burgers vector is generally parallel to the dislocation line. a)-true b)-false

Ahe-xe mixture containing a 0.75 mole fraction of helium is used for cooling electronics in an avionics application. at a temperature of 300 k and atmospheric pressure, calculate the mass fraction of helium and the mass density, molar concentration and molecular weight of the mixture. if the cooling capacity is 10 l, what is the mass of the coolant?

When subject to a steady load (within elastic range) over a long period of time, what is the major difference in material behavoir between steel and plastic?