One reason the skeletal system is important is because a. without the skeletal system, an individual would not have enough calcium to live b. the skeletal system creates the connective tissue and tendons that allow the body to move c. the skeletal system is solely responsible for housing the body's immune system d. the skeletal system is responsible for controlling functions of the entire body select the best answer from the choices provided. a b c d

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