Tres magdalenas tienen 300g de masa. Cada magdalena tiene un 15% en masa de azucar. Halla la concentración en masa y la densidad de una disolucion que se ha hecho con el azucar de una magdalena y 100 centímetros cúbicos de agua si el volumen de la disolución es de 105 mL

Air is contained in a variable-load piston-cylinder device equipped with a paddle wheel. initially, air is at 400 kpa and 17°c. the paddle wheel is now turned by an external electric motor until 75 kj/kg of work has been transferred to air. during this process, heat is transferred to maintain a constant air temperature while allowing the gas volume to triple. calculate the required amount of heat transfer in kj/kg.

Properties seen when one one substance changes to another are known as properties

Four point charges each having charge q are located at the corners of a square having sides of length a. find symbolic expressions for the following. (a) the total electric potential at the center of the square due to the four charges (use any variable or symbol stated above along with the following as necessary: ke.) vtotal= (b) the work required to bring a fifth charge p from infinity to the center of the square (use any variable or symbol stated above along with the following as necessary: w=