A 50 kg box is placed on an inclined plane making an angle of 30 degrees with the horizontal. If the coefficient of kinetic friction is 0.30, find the acceleration of the block down the plane. I have the answer I just need help with work/formulas

What are chlorofluorocarbons and what impact do they have on the atmosphere?

Which statement correctly describes the relationship between frequency and wavelength?

Which statement best describes copper? a. it has a low resistance and prevents charges from moving freely. b it has a high resistance and allows charges to move freely. c. it has a high resistance and prevents charges from moving freely. d. it has a low resistance and allows charges to move freely