• Statement I: True. Gallium is used in manufacturing thermometers due to its wide liquid range.
• Statement II: False. Gallium is used to measure high temperatures, not low temperatures like 256 K (freezing point of brine).
A body of mass 1000 kg is moving horizontally with a velocity of 6 m/s. If 200 kg extra mass is added, the final velocity (in m/s) is: