You are given a material which produces no initial magnetic field when in free space. when it is placed in a region of uniform magnetic field, the material produces an additional internal magnetic field parallel to the original field. however, this induced magnetic field disappears when the external field is removed. what type of magnetism does this material exhibit?

How is sound energy produced a. vibrating objects b. objects being heated c. temperature differences d. stationary objects

An athlete swings a ball, connected to the end of a chain, in a horizontal circle. the athlete is able to rotate the ball at the rate of 8.13 rev/s when the length of the chain is 0.600 m. when he increases the length to 0.900 m, he is able to rotate the ball only 6.04 rev/s. (a) which rate of rotation gives the greater speed for the ball? 6.04 rev/s 8.13 rev/s (b) what is the centripetal acceleration of the ball at 8.13 rev/s? m/s2 (c) what is the centripetal acceleration at 6.04 rev/s? m/s2

Which sections of the heating curve illustrate this process?