FIRST PERSON MARKED BRAINLIEST! EASY 7TH GRADE SCIENCE QUESTION!!! Ella Fitzgerald was a singer who was able to shatter a glass with the sound of her voice. Which of the following is the reason she could do this?
A. Interference
B. Diffraction
C. Resonance
D. Refraction

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