Discover Questions

Why cant people tickle themselves? H(t)=-2(t-1)^2+10..how long did it take the ball to reach maximum height and how long did it take to hit the ground?please show calculations? What factors are used to calculate the osmolarity of a solution, in which solute/solutes are dissolved in normal saline? Write each measurement with the indicated number of significant digits. 1.) 454.12 kg; 3 significant digits 2.) 9.1 in;1 significant digit? Why can't astronauts travel to other planets ?