Son aquellas acciones motoras que el individuo adquiere gracias al entrenamiento. que es? (ayuda)

What is the earliest point in the universe that we can observe? why can’t we see back further than this?

Achild has maximum walking speed of 1.6 m/s. what is the length of the child's legs? 0.26 m

Awelder using a tank of volume 7.50×10^-2 m^3 fills it with oxygen (with a molar mass of 32.0 g/mol ) at a gauge pressure of 3.30×10^5 pa and temperature of 37.1 ∘c. the tank has a small leak, and in time some of the oxygen leaks out. on a day when the temperature is 23.1 ∘c, the gauge pressure of the oxygen in the tank is 2.00×10^5 pa . a) find the initial mass of oxygen. b) find the mass of oxygen that has leaked out.