For each situation, identify when sound would travel faster and why? a. Outside on a winter day or outside on a summer day? b. Through water or air? c. When air pressure is high or low? d. Through a piece of wood that floats in water or through a piece of steel that sinks in water? e. Through a gas that is 90% nitrogen (N2) and 10% helium (He) or through a gas that is 90% helium (He) and 10% nitrogen (N2)?