A tall building is swaying back and forth on a gusty day. The wind picks up and doubles the amplitude of the oscillation. A. By what factor does the maximum speed of the top of the building increase? B. By what factor does the maximum acceleration of the top of the building increase?

When the displacement of a mass on a spring is 12a the half of the amplitude, what fraction of the mechanical energy is kinetic energy? at what displacement, as a fraction of a, is the mechanical energy half kinetic and half potential?

Glass has a hardness that is in the middle of the hardness scale. what is the hardness of glass?

It may seem strange that the selected velocity does not depend on either the mass or the charge of the particle. (for example, would the velocity of a neutral particle be selected by passage through this device? ) the explanation of this is that the mass and the charge control the resolution of the device--particles with the wrong velocity will be accelerated away from the straight line and will not pass through the exit slit. if the acceleration depends strongly on the velocity, then particles with just slightly wrong velocities will feel a substantial transverse acceleration and will not exit the selector. because the acc