Calculate the number of vacancies at 561°C given that the energy for vacancy formation is 1.04 eV/atom; assume that the density at both temperatures is the same.

How is the gravitational force related to the distance between two objects?

Review multiple-concept example 7 in this chapter as an aid in solving this problem. in a fast-pitch softball game the pitcher is impressive to watch, as she delivers a pitch by rapidly whirling her arm around so that the ball in her hand moves in a circle. in one instance, the radius of the circle is 0.626 m. at one point on this circle, the ball has an angular acceleration of 66.1 rad/s2 and an angular speed of 12.6 rad/s. (a) find the magnitude of the total acceleration (centripetal plus tangential) of the ball. (b) determine the angle of the total acceleration relative to the radial direction.

Describe how the motion of a spring being pushed forward and backward is similar to the motion of air particles in a sound wave.