1. An MR-2 starts from rest and accelerates westward to a speed of 27 m/s in 11.8 seconds.
a) What is its acceleration?
b) What is the displacement it covered?

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?

Because light travels in a straight line and casts a shadow, isaac newton hypothesized that light is

Acoil suspended freely, points in some direction when no current is passed through it . can you tell what will happen when a current is passed though it?