How do protons, neutrons, and electrons differ in terms of their electrical charges and locations within helium?

The 20@kg wheel has a radius of gyration about its center g of kg = 300 mm. when it is subjected to a couple moment of m = 50 n # m, it rolls without slipping. determine the angular velocity of the wheel after its mass center g has traveled through a distance of sg = 20 m, starting from rest.

Awave has a wavelength of 7 mm and a frequency of 19 hertz. what is its speed?

During the past 150 years in the united states, how did energy consumption compare to population growth