tv/ movies: Cartoons: The all-purpose toy advertised on "Ren and Stimpy" is this.?

Questions

Leading Arab astronomer & mathematician of his time?

Leaks can be costly. A leak of only one drop per second wastes about ___ ________ litres of water per year?

220 yards = 1 ______?

Light, colorless fluid obtained from the fractional distillation of petroleum?

Light-sensitive organ of vision in animals?