1- El ácido sulfúrico reacciona con el cinc a 20 ºC y 1 atm de presión. Calcula la masa de sulfato de cinc que se forma y el volumen de hidrógeno que se obtiene. S: 97, 2 g de Ag

Trumpeter a holds a b-flat note on the trumpet for a long time. person c is running towards the trumpeter at a constant velocity. person b is running away from the trumpeter at the same rate. person d is standing still the whole time. which person hears a frequency that is lower than the b-flat?

Ineed asap! list 3 examples in which friction us or makes things easier in our daily life. explain the effect of friction for each. *make sure you explain the effect of friction for each example! *

The human body stores chemical energy from digested food. some of the chemical energy is converted into mechanical energy when the body moves. which statement best supported by this information