Name one monosaccharide, disaccharide and polysaccharide carbohydrate.

Monosaccharide - Glucose Disaccharide - Maltose Polysaccharide - Starch

Differentiate |x| at x=0

When we plot |x|, we will see a 'V' type of curve with a sudden change in curve at x=0. Thus function is not differentiable at x=0

Alex is carrying a 30kg bag on his head. He walks a total distance of 10m in forward direction with the bag on his head. Find the work done by Alex.

Work done is dot product of force and displacement. In this case, force is against gravity, in upward direction and displacement is forward hence there is 90-degree angle between F and d. Thus work done = F*d*cos(90) = 0