I. Which runner, if either, is in the lead when t = 6.0 seconds? Justify your answer qualitatively without any equations. ii. Justify your answer about which runner, if either, is in the lead when t=6.0 seconds using appropriate equations.

The 20@kg wheel has a radius of gyration about its center g of kg = 300 mm. when it is subjected to a couple moment of m = 50 n # m, it rolls without slipping. determine the angular velocity of the wheel after its mass center g has traveled through a distance of sg = 20 m, starting from rest.

When a neutral charge, comes into contact with a positive charge they repel each other nothing happens the neutral charge becomes negative they attract each other

If 21.2 kcals of energy is released by this reaction, how many kj does the reaction release? (1 cal 4.184 j)