[O.04H]Which of these statements best describes the potential future impact of various technologies on the environment? The technology used in current power may alter the tides.
The technology used in ocean thermal power may help in navigation.
The technology used in wave power may alter the migration of whales.
The technology used in tidal power may help in the growth of marine life.

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