Optional standard mileage rates for use of a vehicle will change a little for 2015, the IRS announced on Wednesday, with the business use rate going up and the medical and moving rate going down (Notice 2014-79).
Thunderstorms are caused by a collision of warm air and cold air. A thunderstorm is a cloud formation where large amounts of water undergoes a cycle of condensation, freezing then revaporizating as the currents of vapor within the cloud rises and falls. This produces static electricity which discharges as lightning. Thunderstorms are caused by a collision of warm air and cold air. A thunderstorm is a cloud formation where large amounts of water undergoes a cycle of condensation, freezing then revaporizating as the currents of vapor within the cloud rises and falls.
What causes thunderstorms? Thunderstorms form when an air mass becomes so unstable that it overturns (convects) violently. Thunderstorms are most common in the afternoon over land, when daytime heating of the land by the sun causes the lower part of the troposphere to become unstable from higher temperatures and more water vapor in the air.