What tool would you use for measuring the distance around a ball

You use aA string and then you would Measure the string to see how long the string was from a ruler

Explanation:

relative humidity, temperature and dew point -- are bound together in the mathematical relationship below. relative humidity changes when temperatures change. because warm air can hold more water vapor than cool air, relative humidity falls when the temperature rises if no moisture is added to the air. so i would say a