Una bala se dispara a un angulo de 45° con respecto a la horizontal. la magnitud de la velocidad inicial de la bala es de 200 m/s. calcula: a) el tiempo que la bala permanece en el aire.
b) la posicion de la bala cuando alcanza la altura maxima​

What is the most useful equation for electric power?

If a tank filled with water contains a block and the height of the water above point a within the block is 0.8 meter, what is the pressure at point a?

Consider an insulating crystal, made up of layers of atoms. what form would you expect the temperature dependence of the phonon heat capacity to approach at extremely low temperatures if the interlayer coupling is i)very strong (rigid coupling), and ii) very weak. explain.