un tubo diametro interno variable transporta agua. En el punto 1 el diametro es de 20cm y la presion de 130kpa. En el punto 2 que esta 4.0m mas arriba que el punto 1 el diametro es de 30cm. si la tasa de flujo es de 0.080m3/s, cual es la presion en el segundo punto?

How would doubling the made of an object change the objects potential energy

This is the substance(s) formed in a chemical reaction.

Suppose a wheel with a tire mounted on it is rotating at the constant rate of 2.15 times a second. a tack is stuck in the tire at a distance of 0.373 m from the rotation axis. noting that for every rotation the tack travels one circumference (a) find the tack's tangential speed. (b) what is the tacks radial acceleration?