SE está diseñando una máquina de Carnot que usa dos moles de CO2 como sustancia de trabajo; el gas puede tratarse como ideal. El CO2 debe tener una temperatura máxima de 527 °C y una presión máxima de 5.00 atm. Con un aporte de 400 J por ciclo, se desea obtener 300 J de trabajo útil. a) Calcule la temperatura de la fuente fría. b) ¿Durante cuántos ciclos debe operar esta máquina para derretir totalmente un bloque de hielo con masa de 10.0 kg que inicialmente estaba a 0 °C, empleando únicamente el calor cedido por la máquina?

Click the game tab at the bottom of the simulation and select level 1. (there is no seesaw balance for this part of the activity.) balance the first equation, and click check to see if you got it right. if you can’t balance it in the first try, you can try again. work through the five equations for level 1. click continue to go on to level 2, and later level 3. each level is more difficult than the one before. keep trying until all the equations are balanced. in one or two sentences, describe how you did in the balancing game. in a few more sentences, explain one strategy you learned for balancing more complex equations.

The field between two charged parallel plates is kept constant. if the two plates are brought closer together, the potential difference between the two plates either a) decrease b) does not change c) increase?

Two loudspeakers, 5.5 m apart and facing each other, play identical sounds of the same frequency. you stand halfway between them, where there is a maximum of sound intensity. moving from this point toward one of the speakers, you encounter a minimum of sound intensity when you have moved 0.33 m . assume the speed of sound is 340 m/s.part a) what is the frequency of the sound? part b) if the frequency is then increased while you remain 0.21 m from the center, what is the first frequency for which that location will be a maximum of sound intensity? express your answer to two significant figures and include the appropriate units.