Mix And Flow Of Matter

Pressure is measured in Pascals because Pascal is the SI unit of pressure. Work is measured in Joules because Joule is the SI unit of work and energy. Force is measured in Newtons because Newton is the SI unit of force.

When you measure how thick or thin something is, you are measuring how viscous it is. Viscosity refers to the resistance of a fluid to flow, and a high viscosity indicates that the fluid is thick or sticky, while a low viscosity indicates that the fluid is thin or runny. Therefore, the correct answer is "Viscous."

A solution is formed when a solute dissolves in a solvent. In a solution, the solute particles are dispersed and evenly distributed throughout the solvent, resulting in a homogeneous mixture. This is the most common and basic definition of a solution.

Condensation is the process in which a gas changes into a liquid. This occurs when the gas loses heat energy and its particles slow down, coming together to form a liquid. This can be observed, for example, when water vapor in the air cools and turns into liquid water droplets, forming clouds or dew.

When air is released in a submarine, it increases its density. This is because the air takes up space and displaces water, causing the overall density of the submarine to increase. As a result, the submarine becomes heavier and sinks deeper into the water, enabling it to dive.

Decreasing temperature does not increase the rate of dissolving. When the temperature is decreased, the kinetic energy of the solvent particles decreases, resulting in slower movement and fewer collisions with the solute particles. This leads to a slower dissolution process and a lower rate of dissolving. On the other hand, agitation, increasing temperature, and increasing surface area all contribute to an increase in the rate of dissolving. Agitation helps in mixing the solvent and solute particles, increasing temperature increases the kinetic energy and collision frequency, and increasing surface area provides more contact points for the solute particles to interact with the solvent.

The flow rate can be calculated by dividing the volume of oil (12 ml) by the time taken (60 seconds). Therefore, the flow rate is 0.2 ml/second.

Fluid B is less viscous compared to Fluid A because viscosity is a measure of a fluid's resistance to flow. A lower viscosity means that the fluid flows more easily, while a higher viscosity indicates a thicker, more resistant flow. Since Fluid B has a higher flow rate than Fluid A, it implies that Fluid B flows more easily and therefore has a lower viscosity.

The particle model of matter states that particles of different substances have different sizes and masses. The mass of a particle is related to the type of atom it is and how many atoms are combined. For example, a particle of water (H₂O) has a different mass than a particle of carbon dioxide (CO₂).