Una casa posee un volumen total de 600m^3 (con el ambiente a 20°C). ¿Cuánto aire entrará o saldrá de la casa si la temperatura desciende a 0°C? Considera el cambio de volumen asociado a la casa como despreciable.

positive reinforcement? ?

radiation warms things up temp rises convection currents air circ windy weather

the motion of a pendulum is a classic example of mechanical energy conservation. a pendulum consists of a mass (known as a bob ) attached by a string to a pivot point. as the pendulum moves it sweeps out a circular arc, moving back and forth in a periodic fashion.