1. Which secondary sex characteristics would you expect a 13-year-old boy to develop? hipdevelopment and hormone release
O nocturnal emission
O testes development
O voice quality and facial hair

Why is there friction between objects

Ablock of mass 1.5 kg slides down an inclined plane that has an angle of 15. if the inclined plane has no friction and the block starts at a height of 3 m, how much kinetic energy does the block have when it reaches the bottom? acceleration due to gravity is g = 9.8 m/s2. a. 6.8 j b. 50.9 j c. 0 j d. 44.1 j

What occurs during a combustion reaction