1.1)La primera ley de Newton, afirma que todos los cuerpos se mueven en línea recta y con velocidad constante mientras no actúen fuerzas externas sobre ellos, es otra manera de expresar el principio de relatividad de Galileo. si no
Al afirmar que existe una equivalencia entre la masa y la energía expresada por la fórmula:
Donde E es la energía de un cuerpo, m su masa y c2
la velocidad de la luz elevada al cuadrado.
si no

AYUD POR FAVORRR

In a wind tunnel the speed changes as the cross sectional area of the tunnel changes. if the speed in a 6' x 6' square test section is 100 mph, what was the speed upstream of the test section where the tunnel measured 20' x 20'? use conservation of mass and assume incompressible flow. conservation of mass requires that as the flow moves through a path or a duct the product of the density, velocity and cross sectional area must remain constant; i.e., that ova-constant. a model is being tested in a wind tunnel at a speed of 100 mph if the flow in the test section is at sea level standard conditions, what is the pressure at the model's stagnation point? (a) the tunnel speed is being measured by a pitot-static tube connected to a u- tube manometer. what is the reading on that manometer in inches of water? (b) at one point on the model a pressure of 2058 psf is measured. what is the local airspeed at that point?

The boy of mass 30 kg is at r1= 2 meters from the fulcrum. of the girl is 45 kg, at what r2 must she sit so that they are balanced ?

Why is the energy that results from a roller coaster's position at the top of a hill referred to as potential energy?