A mass of 0.4 kg is rotated by a string at a constant speed v in a vertical of radius 1m. if the minimum tension of the string is 3N. calculate
(i). velocity
(ii). The maximum tension
(III). The
tension when the string just horizontal

Determine the age of a fossil if it had only one eighth of its original carbon-14 content remaining?

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

If jason ii needs 15 kw of power at 300 volts to operate, what amperage of current must flow through the cable?