1 For automobiles a taxpayer uses for business purposes, the portion of the business standard mileage rate treated as depreciation is 23 cents per mile for 2013, the same as in 2012. 2  The IRS also publishes a standard mileage rate for the use of a vehicle for medical or moving purposes.
What causes continuous rolling thunder when no lightning visible? Thunder is caused by the rapid expansion of super-heated air as electrical spark passes through. What causes the long (ie some several seconds) of rumbling when no lightning is visible even at night during tropical downpours?
A Thunder Storm is a storm, usually with lightning, thunder and rain, bigger storms can have hail and tornadoes and even sometimes both! Thunder storms are caused by Cumulonimbus clouds (Scientific name: Cumulonimbus capillatus incus), which are massive clouds that can hold enormous amounts of rain.