Q1: Specific weight of liquid

ANS:D - does not vary on any other planet.

The specific weight of a liquid does not remain constant at every place. The specific weight of a liquid depends on factors such as temperature, pressure, and elevation. Therefore, it can vary from one location to another on Earth, as well as on other planets with different environmental conditions. For example, at higher elevations, the atmospheric pressure decreases, which can affect the specific weight of liquids. Additionally, temperature variations can also influence the density and specific weight of liquids. Hence, the specific weight of a liquid does not remain constant at every place.