What is the metric unit of weight? gram/pound/newton/milliliter

How many neutrons does plutonium -196 with an atomic number of 78.

Current from a charged capacitor lights a bulb. as time goes on the brightness of the

While carrying a heavy box up the stairs,you set the box on a step and rest. then you pick up the box and carry it to the top of the stairs. describe these actions in terms of balanced and unbalanced forces acting on the box.