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.
After you see a bolt of  lightning, for every 3 seconds until you hear the thunder, it means  it is one kilometer away (3 seconds = 1 kilomâ¦eter). This is because  the sound wave created by the lightning is traveling at about 330  m/sec (in dry air, the speed of sound is about 343 m/sec or 1127  ft/sec).