Helium is an unreactive gas with a high specific heat capacity. suggest a possible use for helium. (pls don't say balloons because my teacher told us that was wrong).

What are similarities and differences between refraction, reflection, diffraction and absorption?

Nitrogen (n2) undergoes an internally reversible process from 6 bar, 247°c during which pν1.2 = constant. the initial volume is 0.1 m3 and the work for the process is 121.14 kj. assuming ideal gas behavior, and neglecting kinetic and potential energy effects, determine heat transfer, in kj, and the entropy change, in kj/s. show the process on a t-s diagram.

(asap) uneven heating of the earth's surface is due primarily to the position of the equator, north pole, sun, or moon?