Short Q/A Density and Temperature - Students Free Notes

What would happen to the density of an object if its mass remains the same but its volume increases?

The density would decrease, as density is inversely proportional to volume (Density = Mass/Volume). Related Questions: Two liquids A and B have densities of 1 g/mL and 1.2 g/mL, respectively. When both liquids are poured into a container, one liquid floats on top of the other. Which liquid is on top, and why? How is … Read more

Why does the density of water decrease when it turns into ice?

Water expands upon freezing due to the formation of an open hexagonal crystal structure, increasing volume and decreasing density. Related Questions: Two liquids A and B have densities of 1 g/mL and 1.2 g/mL, respectively. When both liquids are poured into a container, one liquid floats on top of the other. Which liquid is on … Read more

How can the density of a liquid be determined using a hydrometer?

A hydrometer is placed in the liquid, and the level at which it floats indicates the liquid’s density, based on buoyancy principles. Related Questions: Two liquids A and B have densities of 1 g/mL and 1.2 g/mL, respectively. When both liquids are poured into a container, one liquid floats on top of the other. Which … Read more

Why do icebergs float in the ocean even though they are made of solid ice?

Ice has a lower density than liquid water due to its crystalline structure, making it buoyant enough to float. Related Questions: Two liquids A and B have densities of 1 g/mL and 1.2 g/mL, respectively. When both liquids are poured into a container, one liquid floats on top of the other. Which liquid is on … Read more

One student claims to have constructed a more sensitive liquid-in-glass thermometer. How can her claim be verified?

By comparing its temperature readings with a standard thermometer at different conditions and checking if smaller temperature changes are detected. Related Questions: Two liquids A and B have densities of 1 g/mL and 1.2 g/mL, respectively. When both liquids are poured into a container, one liquid floats on top of the other. Which liquid is … Read more

Can we increase the sensitivity of a liquid-in-glass thermometer without changing its range?

Yes, by using a thinner capillary tube or a liquid with a higher expansion rate. Related Questions: Two liquids A and B have densities of 1 g/mL and 1.2 g/mL, respectively. When both liquids are poured into a container, one liquid floats on top of the other. Which liquid is on top, and why? How … Read more

Why is a thermocouple thermometer suitable for measuring high temperatures but not a liquid-in-glass thermometer?

A thermocouple thermometer can measure high temperatures due to its heat-resistant metal junctions, while a liquid-in-glass thermometer is limited by the boiling point of its liquid. Related Questions: Two liquids A and B have densities of 1 g/mL and 1.2 g/mL, respectively. When both liquids are poured into a container, one liquid floats on top … Read more

Why is -273.15°C called absolute zero? Can we achieve this temperature?

Absolute zero is the lowest theoretical temperature where all molecular motion stops. It cannot be achieved practically but can be closely approached in laboratories. Related Questions: Two liquids A and B have densities of 1 g/mL and 1.2 g/mL, respectively. When both liquids are poured into a container, one liquid floats on top of the … Read more

Mercury is replaced with alcohol in liquid-in-glass thermometers. Discuss the possible change in sensitivity and range of the thermometer.

Replacing mercury with alcohol increases sensitivity because alcohol expands more with temperature changes. However, alcohol has a lower boiling point and higher freezing point, reducing the thermometer’s range. Related Questions: Two liquids A and B have densities of 1 g/mL and 1.2 g/mL, respectively. When both liquids are poured into a container, one liquid floats … Read more