Una persona desnuda cuyo cuerpo tiene un área superficial de 1.40 m2 con una emisividad de 0.85 tiene una temperatura en la piel de 37 °C y está parada en una habitación a 20 °C. ¿Cuánta energía por minuto pierde la persona a través de la radiación?

Awave is produced in a rope. the wave has a speed of 33 m/s and a frequency of 22 hz. what wavelength is produced?

2kg of refrigerant 134a undergoes a polytropic process in a piston-cylinder assembly from an initial state of saturated vapor at 2 bar to a final state of 12 bar, 80 degree c. a)determine the work for the process in kj. b)sketch the process on a p-v diagram.

How does the kinetic energy of a charge change as the charge moves under the effect of an electric field from higher potential to lower potential? a.the kinetic energy increases.b.the kinetic energy decreases.c.the kinetic energy remains the same.d.the kinetic energy is always zero.