The molar heat capacity is the heat capacity per unit amount (SI unit: mole) of a pure substance and the specific heat capacity, often simply called specific heat, is the heat capacity per unit mass of a material.
Long TSA lines this summer. The TSA is expecting long lines at their security check points during the busy summer travel season â especially when youâre traveling in the morning. The TSA recommends arriving at the airport at least 2 hours early for domestic travel and 3 hours early for international travel.
It's easier for the airlines to say 3 hours than it is to say if you're flying out of BWI, 90 minutes is plenty of time because there are limited international flights there, if you're going out of IAD where there are 20 international flights around the same time 3 hours is barely enough.