Use the diagram to help you answer the question. The map shows a front as it moves east across the United States. Which of these describes the weather change that can be expected for city B? A. The cold front will bring cooler temperatures and snow B. The cold front will bring cooler temperatures with thunderstorms and rain C. The warm front will bring warmer temperatures with hot air for several days D. The warm front will bring warmer temperatures with light rain for a few days

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