If m1 accidentally falls off and shatters when it strikes the floor, the rod holding m4 will move to a vertical orientation so that m4 hangs directly below the end of the rod supporting m2. To what values should m2 and m3 be adjusted so that the other two rods will remain in equilibrium and be oriented horizontally

Observations show that interstellar clouds can have almost any shape and

Consider a uniformly charged ring in the xy plane, centered at the origin. the ring has radius a and positive charge qdistributed evenly along its circumference. a)what is the direction of the electric field at any point on the z axis? . b)what is the magnitude of the electric field along the positive z axis? use k in your answer, where k=14πϵ0. d)the ball will oscillate along the z axis between z=d and z=−d in simple harmonic motion. what will be the angular frequency ω of these oscillations? use the approximation d≪a to simplify your calculation; that is, assume that d2+a2≈a2. express your answer in terms of given charges, dimensions, and constants

The discovery of the electron as a subatomic particle was a result of