Calculate the diffusion coefficient for copper in aluminum at 700°c. pre-exponential and activation energy values for this system are 65x10 and 1 mol, respectively oa.4.6 x 10-15 m2/s ob.5.7x 102m2ts oc.3.9 x 102 m2/s d. 3.25 x 10 12m2/s

Two technicians are discussing a resistance measurement between the can-h and can-l wires. technician a says this measurement should be done with the ignition switch in the "run" position. technician b states that a measurement of 0 ohms indicates an open in the network. which technician is correct?

*drag each tile to the correct location in the sequence* the table shows chronological events in the life of our sun, a medium-sized star. place the missing events into the correct rows of the table.

Which of the following situations is impossible? a) an object has velocity directed east and acceleration directed east. b) an object has zero velocity but non-zero acceleration. c) an object has constant non-zero velocity and changing acceleration. d) an object has velocity directed east and acceleration directed west. e) an object has constant non-zero acceleration and changing velocity.