14. (02.05 hc)
during an investigation a scientist burned 48 g of magnesium strip. after the reaction the total mass of the product formed was found to be 80 g. does the law of conservation of mass hold true in this
case? use complete sentences to justify your answer based on numerical calculations. (10 points)

Afour cylinder four-stroke in-line engine has a stroke of 160mm, connecting rod length of 150mm, a reciprocating mass of 3kg and its firing order is 1-3-4-2. the spacing between cylinders is 100mm. i. show that the engine is in balance with regard to the primary inertia forces and primary 3. a and secondary inertia couples. li determine the out of balance secondary inertia force ii. propose ways of balancing this out of balance force and discuss the challenges that will arise