0 a chemical element that is a gas lighter than air, that will not burn and is used in balloons, airships, and some types of lights -- 氦
Therefore, the thermodynamic properties of pure hydrogen or helium can be calculated directly with the help of a relatively simple interpolation code.
Campers choose the colors that are meaningful to them and counselors blow up helium balloons.
Moreover, in models with helium (and other ions) the thermal force in the steep transition region may play a role in determining the coronal abundances.
At later times, temperature profiles in the helium case reflect the more complex shock history in the helium interior.
Stopping power of dense helium plasma for fast heavy ions.
The simulations star t with helium in its ground state at room temperature.
It is a helium-neon based, one colour, three beam system, capable of measuring two components of velocity using light polarization for discrimination.
Insects were caught in a tapering net suspended several metres below an aerodynamically shaped, helium-filled balloon (blimp) attached to a lightweight motorized winch.
