A runner taking part in the 200m dash must run around the end of a track that has a circular arc with a radius of curvature of 30.0m. The runner starts the race at a constant speed. If she completes the 200m dash in 23.2 s and runs at a constant speed throughout the race, What is her centripetal acceleration as she runs the curved portion of the track

Which of the following is not a characteristic of s waves? a. travel slower than p waves. b. cannot be detected in locations more than 105° from an earthquake’s epicenter. c. travel through solids and liquids. d. only affect coastal regions.

Boxing gloves are padded to lessen the force of a blow. (a) calculate the force exerted by a boxing glove on an opponent’s face, if the glove and face compress 7.50 cm during a blow in which the 7.00-kg arm and glove are brought to rest from an initial speed of 10.0 m/s. (b) calculate the force exerted by an identical blow in the gory old days when no gloves were used and the knuckles and face would compress only 2.00 cm. (c) discuss the magnitude of the force with glove on. does it seem high enough to cause damage even though it is lower than the force with no glove?

Which of the following list the divisions of the geologic time scale in order from longest to shortest