Velocity is a description of an object's

What is the ima of the 1 st class lever in the graphic given? 2 3 0.5

What are the first two quantum numbers for the electrons located in subshell 4d? what are the first three quantum numbers for the electrons located in subshell 2s? how many electrons can be held in a sublevel l = 3? how many electrons can be held in the energy level n = 4? how many electrons in an atom can share the quantum numbers n = 4 and l = 3?

What type of reaction fuels the processes seen here?