FreeNotes
The work done in raising a box depends on the height to which it is lifted and not on the speed at which it is raised. Work is defined as the product of the force applied to move an object and the distance over which it moves in the direction of that force. The force … Read more
When a car moves with a constant speed along a straight road, there is no work done on the car by the net force. According to the work-energy theorem, work is the product of force applied to an object and the displacement in the direction of the force. If the car’s speed is constant, there … Read more
Archimedes’ Principle Archimedes’ Principle states that any object, partially or completely submerged in a fluid (liquid or gas), experiences an upward buoyant force equal to the weight of the fluid displaced by the object. This buoyant force acts in the opposite direction to the force of gravity, and it is the reason objects float or … Read more
Working of a Digital Thermometer A digital thermometer measures temperature using electronic sensors and provides a numerical reading on a digital display, typically in degrees Celsius (°C) or Fahrenheit (°F). The working principle of a digital thermometer generally involves the following key components and processes: 1. Sensor Thermistor or Resistance Temperature Detector (RTD): Digital thermometers … Read more
Why Gases Have Lower Densities Than Solids and Liquids The primary reason gases have lower densities than solids and liquids is due to the arrangement and behavior of their molecules. The key factors that contribute to this difference include: 1. Molecular Arrangement and Forces Between Molecules Solids: In solids, molecules are tightly packed together in … Read more
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
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
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
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
Hot air is less dense than cold air. As air is heated, its molecules spread apart, decreasing density, causing it to rise. Cold air is denser and sinks. 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