A3-kg block is observed to accelerate at a rate twice that of a 6-kg block. is the net force acting on the 3-kg block twice as large as that acting on the 6-kg block? explain.

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 type of reaction is shown in this energy diagram ?

Use vsepr theory to predict the molecular geometry of the molecule hcn.