Meg walks with a velocity of 0.9 m/s west. she does so while riding on a train that is traveling with a velocity of 2.7 m/s east. what is megs velocity? a. 3.6 m/s west b. 1.8 m/s west c. 1.8 m/s east d. 3.6 m/s east

Which of the following is considered to be a vector?               a.  temperature    b.  velocity    c.  time    d.  mass

Arigid tank is divided into two equal parts by a partition. one part of the tank contains 3 kg of compressed liquid water at 400 kpa and 60°c while the other part is evacuated. the partition is now removed, and the water expands to fill the entire tank. determine the entropy change of water during this process, if the final pressure in the tank is 40 kpa. use steam tables.

The voltage applied across a given parallel-plate capacitor is doubled. how is the energy stored in the capacitor affected?