A50-kilogram student threw a 0.40-kilogram ball with a speed of 20 meters per second. what was the magnitude of the impulse that the student exerted the ball?

Which of the following is a characteristic shared by both electron and light microscopes? a. they both employ the use of objective lenses. b. both microscopes require an internal camera to visualize the specimen. c. both microscopes have a resolving power of 0.01 nm. d. they both utilize white light to magnify the specimen.