The first person to produce ultrasonic waves by whistling was Galton. Sir Francis Galton, a polymath and cousin of Charles Darwin, discovered ultrasonic waves in 1883 through his experiments with high-pitched whistles. His work laid the foundation for understanding and ...
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Ultrasonic waves cannot be heard by humans. They have frequencies higher than 20,000 Hz, beyond the range of human hearing. While some animals can detect ultrasonic frequencies, humans cannot perceive these waves audibly without the aid of specialized equipment.
Ultrasonic waves have frequencies more than 20,000 Hz, beyond the upper limit of human hearing. They are used in various applications such as medical imaging, industrial cleaning, and sonar.
Infrasound waves have frequencies less than 20 Hz. They are below the threshold of human hearing, which ranges from 20 Hz to 20,000 Hz. Infrasound can be generated by natural events such as earthquakes and volcanic eruptions, as well as ...
It snows on high hills because the temperature is lower than the freezing point, causing water vapor to freeze and turn into ice. As air rises over the hills, it cools, and if the temperature drops below freezing, the water ...
The boiling point of water depends on the pressure above the open surface of water. As pressure increases, the boiling point rises, and as pressure decreases, the boiling point lowers.
The rate of evaporation for a certain liquid depends on all the above factors. It depends on the temperature of the liquid, the temperature of the air, and the open surface area of the liquid.
It will take more time to cook rice on Mount Everest due to the lower atmospheric pressure at high altitudes, which lowers the boiling point of water. This means water boils at a temperature below 100°C, slowing the cooking process.
The rate of evaporation does not depend on the total volume of the liquid. Evaporation primarily depends on factors such as temperature, surface area, and air pressure. The volume of the liquid does not directly influence the rate at which ...
The temperature at which ice, water, and vapor coexist in equilibrium is called the triple point. This is a unique thermodynamic state where all three phases are present simultaneously.