Connecticut considers banning balloons that are not biodegradable

SOLVED: 1. Calculate the electrical force between two protons in the nucleus of a helium atom when separated by 2.0 x 10 -15 m.

SOLVED:A beam of charged particles consisting of protons, electrons, deuterons, and singly ionized helium atoms and H2 molecules all pass through a velocity selector, all emerging with speeds of 2.5 ×10^6  m / s. The beam then enters a region of uniform magnetic field B=0.40  T directed perpendicular to their velocity. Compute the radius of curvature of the path of each type of particle.

A helium nucleus has two protons and two neutrons. How many electrons does it take to equal the mass of a helium nucleus?

Choir Boy Uses Helium Balloon to Hit Higher Notes

A gas refrigeration cycle with a pressure ratio of 4 uses helium as the working fluid. The temperature of the helium is -6^∘ C at the compressor inlet and 50^∘ C at the turbine inlet. Assuming isentropic efficiencies of 85 percent for both the turbine and the compressor, determine ( a ) the minimum temperature in the cycle, (b) the coefficient of performance, and ( c ) the mass flow rate of the helium for a refrigeration rate of 25 kW. | Numerade

16 Uses of Helium That One Must Know - Techiescientist