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.
Bottom Line. Check with your airline and the airport you are flying out of for their recommendations on how early to arrive for an international flight. In general, plan to arrive somewhere between two and three hours before your scheduled flight departure time. Alexander Gatsenko/iStock/Getty Images.