Con qué velocidad inicial fue lanzado un cuerpo que cuando ha subido 15cm posee una velocidad de 3 m/s; qué tiempo ha estado subiendo; hallar la altura máxima y el
tiempo total de vuelo si llega al lugar de donde partió.

An initially unpolarized light if intensity 500 w/m^2 passes through four polarizers. the transmission axis between adjacent polarizers is 45∘. what percentage of the initial intensity is transmitted by the system?

For which pair of objects would adding the same a

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.