<h3>One reason we should know what the directions of the forces acting on an object is so we can know if we have to add or subtract. same = add together, opposite = subtract from each other. Also if we don't pay attention to the direction the Net force will be wont be accurate. There will be factors that will upset the calculation.So we must know the direction of the two forces because we have to know if we are adding or subtracting and if the answer is accurate. </h3>
<em>I hope this helps!.</em>
Answer:
Part a)
Part b)
-Energy transfer between the system (water plus pan) and the surroundings was negligible during this time.
-The heat capacities for both water and aluminum hardly change with temperature in this temperature range.
Part c)
Explanation:
Part a)
Heat given by water = heat absorbed by container
so we will have
now we have
Part b)
-Energy transfer between the system (water plus pan) and the surroundings was negligible during this time.
-The heat capacities for both water and aluminum hardly change with temperature in this temperature range.
Part c)
Total energy transfer due to temperature difference is given as
Also we did work of 26432 J on it so total energy transferred to it