Acarpenter’s sketch of a room does not include a scale. she measures a wall that has been built and finds that it is 38.5 ft. long. on the blueprint this wall is 7 in. long. what is the scale for this blueprint?

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

What is a subatomic particle with a negative charge and very little mass?

Explain what will happen if decomposers were apsent from a forest ecoysystem.