Desde que dejamos caer una piedra en un pozo hasta que nos llega el sonido del choque con el agua, transcurren 2 s. Si la velocidad del sonido en el aire es de 340 m/s, determina la profundidad a la que se encuentra la superficie del agua.

Sol: 17m

Avoltaic cell converts chemical energy to

Which of the choices are parts of an atom? select all that apply. a.) compound b.) electron c.) neutron d.) molecule e.) photon f.) proton g.) element

Review multiple-concept example 7 in this chapter as an aid in solving this problem. in a fast-pitch softball game the pitcher is impressive to watch, as she delivers a pitch by rapidly whirling her arm around so that the ball in her hand moves in a circle. in one instance, the radius of the circle is 0.626 m. at one point on this circle, the ball has an angular acceleration of 66.1 rad/s2 and an angular speed of 12.6 rad/s. (a) find the magnitude of the total acceleration (centripetal plus tangential) of the ball. (b) determine the angle of the total acceleration relative to the radial direction.