Astudent holds a diverging lens 25.0 cm from the lettering on a poster on the wall. a virtual image of the letters is formed 10.5 cm between the lens and the wall. what are the focal length of the lens and orientation of the image? a) 7.4 cm and upright b) 7.4 cm and inverted c) 18.1 em and upright d) 18.1 em and inverted e) -7.4 cm and upright

You are driving to the grocery store at 20 m/s. you are 110m from an intersection when the traffic light turns red. assume that your reaction time is 0.50s and that your car brakes with constant acceleration. how far are you from the intersection when you begin to apply the brakes? what acceleration will bring you to rest right at the intersection? how long does it take you to stop after the light changes? the known values: vi=20m/s xi=110m t=.50s vf=0m/s xf=0m a=?