The log mean temperature difference (also known by its initialism LMTD) is used to determine the temperature driving force for heat transfer in flow systems, most notably in heat exchangers. The LMTD is a logarithmic average of the temperature difference between the hot and cold streams at each end of the exchanger. The larger the LMTD, the more heat is transferred.
LMTD = (delta T A - delta T B)/ (ln(delta T A / delta T B))
If you placed a perforating gun 2000 ft underneath the ground and ignite the charge. Which direction would it blast? If you were do the same, but the depth was 200 ft, would you expect the same direction? Why?
be yourself - go towards the beginning or you'll have heard some pretty good ones; if you do go later, the old "and to candidate x's point, I agree, and would like to add y" - troubleshooting, strong work ethic, adventure seeking, enjoy travel, like the outdoors, reputation of company are things you might mention, but if you would consider working at a tech center you might want to add that in your presentation.