Awoman stands on a scale in a moving elevator. her massis
60.0 kg and the combined mass of the elevator and scale is
anadditional 815 kg. starting from rest, the elevatoraccelerates
upward. during the acceleration, there is tensionof 9410 n in the
hoisting cable. what does the scale readduring the
acceleration?

Immediately upon reaching its lowest point, a falling pendulum bob has its greatest amount of energy, which is the initial amount of potential energy. a. heat; less than b. heat; more than c. kinetic; less than d. kinetic; more than

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

Scientific models are based on current knowledge, which can limit their effectiveness when new discoveries are made.