Which reaction below represents a balanced, combustion chemical reaction?
a) c2h5oh + 3o2 → 2co2 + 3h2o
b) c2h5oh + 3o2 → 2co + 3h2o
c) li2co3 → li2o + co2
d) 2li + 2h2o → 2lioh + h2

Estimate the schwarzschild radius (in kilometers) for a mini-black hole formed when a superadvanced civilization decides to punish you (unfairly) by squeezing you until you become so small that you disappear inside your own event horizon. (assume that the your weight is 50 kg)

Will mark as brainliest how does a catapult increase the trajectory of an object? ps. answer as if u were a 5th grader

Ahot-air balloon is 11.0 m above the ground and rising at a speed of 7.00 m/s. a ball is thrown horizontally from the balloon basket at a speed of 9.00 m/s. ignore friction and air resistance and find the speed of the ball when it strikes the ground.