What happens to the force applied by the person pushing a crate (F applied) is the frictional force increases? What can I do to change this force?

Which statement is true? a. kepler's laws apply only to the motion of earth. b. kepler's laws can be used to predict eclipses. c. kepler's laws are true for a central force that is directly proportional to distance. d. kepler's laws can be deduced from newton's laws of motion and gravity.

Light traveling in a medium with a refractive index 1.19 is incident on a plate of another medium with index of refraction 1.79. at what angle of incidence is the reflected light fully polarized?

When flexing to a reflective style, one should be specific, brief and to the point, and maintain a fast and decisive pace?