Aperson holds onto an object for 2 minutes, but doesn’t move the object. is work done on the object?

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?

Which lists the pairs of plates in order from least to greatest in terms of the work done to move the electron?

Which of the following is not a transverse wave? a) soundb) lightc) radiod) all of thesee) none of these