An Atwood's machine (see the figure below) consists of two masses: one of mass 1.23 kg and the other of mass 4.96 kg. When released from rest, what is the acceleration of the system? (Enter the magnitude in m/s2.)

If water vapor with the mass of 35.0 grams is cooled and condensed into water in a closed system such as a closed glass jar, what is the mass of the water after the water vapor completely condenses? a) 34.5 grams b) 35.0 grams c) 35.5 grams d) the mass cannot be determined without knowing the volume