A student put the powder to the corom board . Sciencetific reason for adding powder is , A- frictional force is increased by powder.
B- frictional force is decreased by powder .
C- the speed of carom discs is increased due to powder.
D- the speed of carom discs is decreased due to powder .​

B or D

Explanation:

think of it how you use chalk on a chalk board, its less friction using chalk instead lets say a marker on a white board.

image result for how many calories of energy will 20 grams of carbohydrates provide in one gram provides 4 calories

consuming the right balance of protein, carbohydrates and fat can you maintain a healthy weight and optimize your energy levels. protein and carbohydrates both contain 4 calories per gram, while fat provides 9 calories per gram.

i think the answer is g1

hope i

-lavira: )