Short Q/A Density and Temperature

Why are fixed point scales required for thermometers? What difficulties are there when setting fixed points for thermometer scales?

Fixed points provide reference temperatures for calibration. Difficulties include maintaining pure substances at fixed temperatures and accounting for environmental variations. 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 internal energy of a substance without increasing its temperature?

Yes, internal energy can be increased by changing the phase of a substance (melting, boiling) or doing work on it, even if the temperature remains constant. 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 water not used in liquid-in-glass thermometers?

Water is not used because it has a high freezing point (0°C), a low boiling point (100°C), and adheres to glass, making readings inaccurate. 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

How is plasma the fourth state of matter? Give a reason.

Plasma is a state of matter where atoms lose electrons due to high energy, creating a mixture of free electrons and positive ions. It occurs naturally in stars and lightning. 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 … Read more

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?

Liquid A is on top because it has a lower density than liquid B. Less dense liquids float on denser ones due to the difference in buoyant force. Related Questions: Differentiate the terms ‘science’, ‘technology’, and ‘engineering’ with suitable examples. Explain the terms hypothesis, theory, and law with examples. Define the scientific method and list … Read more