no
Indy cars race in the rain on street and road courses, however they do not on ovals.
yes
09 Indy has not been run and Dale Jr does not race Indy cars
9
The standard amount of cars in NASCAR is 43.
Danica Patrick has raced both open wheel race cars in the Indy Racing League, and stock cars in the Nascar Cup and Nationwide Series.
Indy 500, open wheel cars, NASCAR holds the brickyard 400 at Indy every year.
Scott Robinson has written: 'Yestales' 'Indy cars' -- subject(s): Automobile racing, Formula One automobiles, Indianapolis Speedway Race, Indy cars, Juvenile literature
Starting in 2006, the IRL switched to Ethanol.
Most countries have some form of auto racing be it indy, F1, Rally, Drift, Autocross or offroad.
It is possible to drift and drift race with electric cars. Electric cars are generally lighter than combustion engines which makes them more susceptible to drifting and sliding. In the following video an electric car demonstrates it's ability to drift. (http://www.youtube.com/watch?v=XqBXQ1lq0PE)
Car race is the Indy 500. Horse race is the Kentucky Derby.