El agua hierve a 330 KPa en una olla a presión. La olla contiene 3 Kg de agua inicialmente. Una vez que la ebullición del agua ha comenzado, se observa que tres cuartas partes del agua dentro de la olla se han evaporado en 30 minutos. La pérdida de calor en la olla es despreciable. Determine la tasa de energía transferida a la olla con tablas de vapor

Try c ? that’s what i got

Answer(a)   the matererials that are in contact, the two materials and the nature of their surfaces/// (b)/// the force pushing the two surfaces together, pushing the surfaces together causes the more of the asperities to come together and increases the surface area in contact with each other

I'm having some difficulty seeing the diagram clearly.but the question says there's a net inward force on the object.so we know right away,  from newton's 2nd law of motion, thatthat baby is accelerating.  it doesn't even matter which way thenet force is pointing.  if there's any net force, then either theobject's speed or else its direction must be changing.