Weight is thought to be how big or how small and object is. Which of the following is another definition of weight

Ben(55 kg) is standing on very slippery ice when junior(25kg) bumps into him. junior was moving at a speed of 8m/s before the collision and ben and junior embrace after the collision. find the speed of ben and junior as they move across the ice after the collision .

In the first law of thermodynamics, triangle e=q-w, what does q stand for

Under normal conditions, describe how increasing the temperatures effects the solubility of a typical salt