Thao tác heimlich dựa trên nguyên tắc nào

Truck traveling west on the highway experiences an acceleration to the east. what could be the cause of this acceleration

Holes drilled several kilometers into earth’s crust provide direct evidence about earth’s interior in the form of

Abag of potato chips contains 2.00 l of air when it is sealed at sea level at a pressure of 1.00 atm and a temperature of 20.0 deg c. what will be the volume of the air in the bag if you take it with you, still sealed, to the mountains where the temperature is 7.00 deg c and atmospheric pressure is 70.0 kpa? assume that the bag behaves like a balloon and that the air in the bag is in thermal equilibrium with the outside air.