Despeje h y realice las operaciones indicadas. ¿será dimensionalmente correcto el resultado sabiendo que se trata de una altura? 2(32.2 pies/seg²) h= 244 pies²/seg²-64 pies²/ seg².

un móvil camina al Este 100km, luego al Norte 60km. después a una dirección 36° al Este del Norte 50 km. Dibuje el diagrama vectorial y encuentre el desplazamiento del móvil gráfica y analíticamente.

Dado el vector C= 3km/h a 60° con la horizontal, calcule en forma gráfica y analítica:
a) 5C, b) -3C, C) -1/2C.
​

Which of these best describes an ionic bond?

Stage in which a typical star has completely stopped fusion

Modern pennies are composed of zinc coated with copper. a student determines the mass of a penny to be 2.482 g and then makes several scratches in the copper coaling (to expose the underlying zinc). the student puts the scratched penny in hydrochloric acid, where the following reaction occurs between the zinc and the hcl (the copper remains undissolved): zn(s) + 2 hcl(aq) → h2(g) + zncl(aq)the student collects the hydrogen produced over water at 25 °c. the collected gas occupies a volume of 0.899 l at a total pressure of 79 j mmhg. calculate the percent zinc (by mass) in the penny. (assume that all the zn in the penny dissolves.)