Madeline is measuring wavelengths. Look at her notes above. What mistakes has she made in her measurement? What should she do differently to obtain the correct wavelength?

Abumper car with a mass of 250 kg is traveling at a speed of 4 m/s. this bumper car collides and sticks to a second bumper car with a mass of 250 kg, which is initially at rest. what is the final speed of these two bumper cars after the collision, assuming they remain stuck together?