I. “Physics helps in attaining sustainable development of our society.” Discuss the given statement by mentioning THREE important roles of physics. ii. Describe any THREE important contributions of physics in the field of technology.

iii. Describe any three contributions of physics in the field of science.

the gas collects in coils that then becomes a liquid that then flows through the coils inside the refrigerator

firearm identification is the process of analyzing the bullets and cartridge cases left at a crime scene to determine if they came from a particular firearm. marks on the bullets and cartridges may be common to every firearm of that type. these are called class characteristics.

when two balls of the different masses are dropped from equal height, they reach the ground at the same time .this is because they experience the same acceleration.

the acceleration is independent of mass.

thus when they are dropped they will always maintain the same velocity and travel the same distance (neglect air resistance of course) at the same time.