They are about the same, in some cases Nascar is faster. The top speed for both is around 200 mph.
Indy 500, open wheel cars, NASCAR holds the brickyard 400 at Indy every year.
It means that there are faster cars approaching during the race. Lapped cars should give way to the faster cars.
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 cars race in the rain on street and road courses, however they do not on ovals.
No, they do not. Manual transmissions are used in Nascar race cars.
Which race? A dragster is faster than both, but only runs a straight line for 1/4 mile. NASCAR and Formula 1 cars run different races, different tracks.
43 cars start the race for a NASCAR event.
Because they are "stock cars" and NASCAR wants their race cars to look something like what you buy at the dealer.
43 race cars in each race.