The condition for which a solid sinks in a liquid is: a) The density of the solid is less than that of the liquid b) The density of the solid is greater than that of the liquid c) The density of the solid is equal to that of the liquid d) The volume of water displaced is greater than the volume of the solid. pls ans

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