Abox of weight w=2.0n accelerates down a rough plane that is inclined at an angle ? =30? above the horizontal, as shown (figure 6) . the normal force acting on the box has a magnitude n=1.7n, the coefficient of kinetic friction between the box and the plane is ? k=0.30, and the displacement d? of the box is 1.8 m down the inclined plane.

part a. what is the work wn done on the box by the normal force?

express your answers in joules to two significant figures.
part b. what is the work wfk done on the box by the force of kinetic friction?

Which of the following statements comparing electron microscopy and light microscopy is false? which of the following statements comparing electron microscopy and light microscopy is false? both the electron microscope and the light microscope use the same wavelengths for illumination. images produced by light microscopes can be in color, whereas electron microscope images are black and white unless they are artificially colored. the electron microscope has greater resolution than the light microscope. electron microscopes can allow examination of viruses and internal cell structures, whereas light microscopes are limited to objects that are 0.5 micrometers and larger. request answer