10.-17.14 pointsOBIn Phys7 5.2.003. What is the significance of absolute zero? This answer has not been graded yet. Show My Work (Optional) 11.-/7.14 points OBIn Phys7 5.2.004. What happens to the atoms and molecules in a substance as its temperature increases? This answer has not been graded yet. Show My Work (Optional) 12.-17.14 pointsOBIn Phys7 5.2.006. Air molecules in a warm room (27Â°C = 300 K) typically have speeds of about 500 m/s (1,100 mph). Why is it that we are unaware of these fast-moving particles continuously colliding with our bodies? Because the air molecules are everywhere around us they constantly collide with our bodies from all directions. The effect of these collisions tend to cancel out. The density of the warm air is so low that the air molecules tend to miss our bodies The mass of an air molecule is so miniscule that its momentum and kinetic energy are too small to be evident in the collision with a human body. The size of an air molecule is extremely small, so its momentum and kinetic energy are not efficiently transferred to our bodies when the collisions with a human body occur. Show My Work (Optional) Solution Significance of Absolute Zero Absolute Zero is that temperature where the fundamental particles (atoms and molecules) of nature have minimal vibrational motion. Absolute Zero is the temperature 0K or -273*C. At absolute zero the gaseous molecules seized to move as they donot posses any energy and their entropy is zero. Temperature Increase When temperature is increased the kinetic energy of the atoms and molecules of a gas increases which increase their velocity. In case of liquid they when the temperature increases them random motion of the molecules increases. If the substance is a solid then it gets heated up and its dimensions may change. For example when we heat a rod it\'s length gets increased. 12. Option A. Air molecules are all around and forces exerted by them gets cancelled out. .