Which of the following is the best example of kinetic energy? A bowling ball rolling toward the pins
A horse standing in an open field
A pitcher preparing to throw a ball
A runner in position at the start line

How has the scientific community addressed the safety of chemicals? a. chemicals are repeatedly tested, even those that have existed for a long time. b. existing chemicals are tested if they have never been tested before. c. chemicals are tested if they are suspected to have caused a problem. d. only new chemicals are tested.

Calculate the molar mass of aluminum oxide (al2o3). express your answer to four significant figures.

4. a 20-kg child is tossed up into the air by her parent. the child is 2 meters off the ground traveling 5 m/s. circle one: ke / gpe / both show your work for finding the values of each type of energy the object has: