DEFINITION of 'Aggregate Demand'. The total amount of goods and services demanded in the economy at a given overall price level and in a given time period. It is represented by the aggregate-demand curve, which describes the relationship between price levels and the quantity of output that firms are willing to provide. Normally there is a negative relationship between aggregate demand and the price level. Also known as total spending.
Answers. Best Answer: Up to about 120 decibels, which is about as loud as a gunshot. Some of the factors that affect the loudness are energy released, the environment, and of course the distance you are from the lightning.
While heat lightning is really just ordinary lightning from a far away thunderstorm, the typical sound of rumbling thunder is muffled either by long distances or by a blocking, mountainous terrain. The cracking sound of lightning is thunder, which results from the rapid expansion of hot and cold air masses. Another reason no sound accompanies heat lightning is the idea that thunder travels much more slowly than light, and it's unlikely to hear thunder from a distance greater than 10 miles.