ESPEE IT PARK Interview Questions and Answers

Density is the measure of mass per unit volume of a substance.

• Density is calculated by dividing the mass of a substance by its volume.

• It is usually measured in units of grams per cubic centimeter (g/cm³) or kilograms per cubic meter (kg/m³).

• The density of a substance can be used to identify it, as different substances have different densities.

• For example, the density of water is 1 g/cm³, while the density of iron is 7.8 g/cm³.

• Density can also be affected by temperature and pr...read more

A pressure cooker is a kitchen appliance that cooks food quickly by trapping steam inside the pot.

• Water is added to the pot and heated to create steam

• The steam builds up pressure inside the pot, raising the boiling point of water

• This allows food to cook faster than traditional methods

• The pressure is released through a valve when cooking is complete

• Pressure cookers are commonly used for cooking rice, beans, and stews

Normality is the concentration of a solution expressed in equivalents per liter, while molarity is the concentration expressed in moles per liter.

• Normality measures the number of equivalents of a solute per liter of solution.

• Molarity measures the number of moles of a solute per liter of solution.

• Normality is used in acid-base reactions, while molarity is used in other types of reactions.

• For example, a 1M solution of HCl has a normality of 1N, while a 1M solution of NaOH has a...read more

Relative density is the ratio of the density of a substance to the density of a reference substance.

• It is also known as specific gravity.

• It is a dimensionless quantity.

• It is used to compare the density of different substances.

• Water is often used as the reference substance with a relative density of 1.

• If the relative density is less than 1, the substance will float in water.

• If the relative density is greater than 1, the substance will sink in water.

Newton's 1st law states that an object at rest will remain at rest and an object in motion will remain in motion unless acted upon by an external force.

• Also known as the law of inertia

• Inertia is the tendency of an object to resist changes in its motion

• Examples include a book on a table, a ball rolling on a flat surface, and a car moving at a constant speed on a straight road

• This law is the basis for seat belts and airbags in cars

Thermodynamics is the study of heat and its relationship with other forms of energy.

• It deals with the transfer of heat and energy between systems

• It involves the study of thermodynamic properties such as temperature, pressure, and entropy

• It is used in the design and analysis of engines, refrigeration systems, and power plants

• Examples include the Carnot cycle, the ideal gas law, and the laws of thermodynamics