What is the nutrient used to petri dishes to grow bacteria?

Sterile powdered agar with nutrients can be mixed with water, heated and then poured into empty petri plates or ready-to-use dishes can be purchased. The undigestible agar is a gelatin-like substance with a semi solid surface on which the bacteria can grow while they consume the added nutrients (like sheep's blood).

Earth's escape velocity is 11.2 km/splanes only fly up to 0.3 km/s at most.planes won't even be able to get out ofearth's gravitational pull.nonetheless survive the vacuum.