Describe two pieces of evidence that support the hypothesis that an asteroid impact was responsible for the iridium anomaly.

One form of energy can be another type of energy. a. created to form b. transformed into c. destroyed and then created to form

If angle "a" is 25°, angle "b" is: a) equal to angle c b) less than angle c c) greater than angle c

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