1. A toy car with a mass of 3.1 kg has 60 J of kinetic energy as it drives along the straight part of a racetrack. What is the velocity of the car?

Which of the following is true about fossils? a. fossils found in lower layers of sedimentary rock are older than fossils found in upper layers of sedimentary rock. b. fossils found in lower layers of sedimentary rock are as old as fossils found in upper layers of sedimentary rock. c. the relative age of fossils cannot be determined from their position in sedimentary layers.