How is the energy produced in a nuclear reaction determined? a. by multiplying the change in mass by the square of the speed of light b. by multiplying the frequency by planck's constant c. by multiplying the mass by the square of velocity and dividing by two d. by multiplying the mass by the acceleration due to gravity and the height

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