Power is defined as the rate of doing work or the rate of transfer of energy.
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Power measures the speed at which these vehicles change energy or do work.
A more powerful vehicle can complete a journey in a shorter time than a less powerful one.
A stronger person can typically do certain work in less time compared to a weaker person.
Food cooks faster in a pressure cooker because the high pressure inside increases the boiling point of water, raising the cooking temperature. This higher temperature accelerates the cooking process, reducing the time needed to cook the food.
The specific heat of an object depends on the material composition of the object. It is a property inherent to the substance, indicating the amount of heat required to change the temperature of a unit mass by one degree Celsius.
Wearing white clothes in summer is comfortable because white reflects most of the sunlight, reducing heat absorption. This reflection minimizes the heat retained by the clothes, keeping the body cooler.
The outer part of the bottom of cooking utensils is often left black because black surfaces are excellent absorbers of heat. This allows the utensil to absorb more heat from the stove efficiently, leading to quicker and more even cooking.
A white and smooth surface is a poor absorber of heat and a good reflector. It reflects most of the incoming light and heat, minimizing absorption and thus remaining cooler.
Air conditioners control both temperature and humidity, air coolers primarily cool the air through evaporation and do not effectively control humidity.