Amass m is tied to an ideal spring with force constant k and rests on a frictionless surface. the mass moves along the x axis. assume that x=0 corresponds to the relaxed position of the spring. the mass is pulled out to a position xm and released. derive an expression for the positions at which the kinetic energy of the mass is equal to the elastic potential energy of the spring.

Ways that industry and agriculture use physical properties to separate substances

Asilver dollar is dropped from the top of a building that is 1324 feet tall. use the position function below for free-falling objects. s(t) = −16t2 + v0t + s0 (a) determine the position and velocity functions for the coin. s(t) = v(t) = (b) determine the average velocity on the interval [1, 2]. ft/s (c) find the instantaneous velocities when t = 1 second and t = 2 seconds. v(1) = ft/s v(2) = ft/s (d) find the time required for the coin to reach the ground level. (round your answer to three decimal places.) t = s (e) find the velocity of the coin at impact. (round your answer to three decimal places.) ft/s

When thorium (90 protons) ejects a beta particle, the resulting nucleus has question 18 options: 87 protons. 88 protons. 89 protons. 90 protons. none of the above