What is the change in velocity if the final velocity is 80 mph and the initial velocity is 20 mph? is the object speeding up or slowing down?

One day, after pulling down your window shade, you notice that sunlight is passing through a pinhole in the shade and making a small patch of light on the far wall. you see that the patch of light seems to be a circular diffraction pattern. it appears that the central maximum is about 1 cm across and you estimate that the distance from the window shade to the wall is about 3 m. what is (a) the average wavelength of sunlight? (b) the diameter of the pinhole?

Explain what makes a passenger in a turning car slide toward the door. critical thinking

Which statement correctly describes the relationship between frequency and wavelength?