Which the following statements about the force of friction is true?

a. friction acts in the direction opposite to weight.

b. friction acts in the same direction as the normal force.

c. friction acts in the same direction as weight.

d. friction acts in the direction opposite to an object's motion.

who knows how to do this?

Calculate the minimum energy required to remove one proton from the nucleus 126c. this is called the proton-removal energy. (hint: find the difference between the mass of a 126c nucleus and the mass of a proton plus the mass of the nucleus formed when a proton is removed from 126c.) express your answer with the appropriate units. emin e m i n = nothing nothing request answer part b how does the proton-removal energy for 126c compare to the binding energy per nucleon for 126c, calculated using eb=(zmh+nmn−azm)c2?