If the pressure is doubled, the speed of sound in air remains 332 m/sec. The speed of sound in a medium like air primarily depends on temperature, not pressure. Therefore, changes in pressure do not significantly affect the speed of ...
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Bats can fly in the dark because they produce very intense sound waves which control it. Bats use echolocation, emitting high-frequency sound waves and interpreting the echoes to navigate and locate prey in darkness. This biological adaptation allows them to ...
Explosions are not heard on the Moon away from the surface Due to the absence of atmosphere. Sound requires a medium like air to propagate, and the Moon’s vacuum-like environment lacks air molecules necessary to transmit sound waves. Therefore, no ...
Humans feel sound vibrations in the frequency range of 20-20,000 Hz. This range encompasses the audible spectrum where human ears are sensitive to vibrations in the air, allowing us to perceive sound from low-pitched tones to high-pitched sounds like bird ...
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 thermometer suitable for measuring 2000 °C is a total radiation pyrometer. These devices are designed to measure extremely high temperatures by detecting the thermal radiation emitted by an object, making them ideal for temperatures far beyond the range of ...
In winter, two thin shirts provide more comfort than one thick shirt because the layer of air trapped between the two shirts acts as an insulating medium. This air layer reduces heat loss from the body, keeping it warmer.
The reason a glass of water does not change into ice at 0°C is that to freeze the water, some amount of heat must be removed from it. Freezing occurs when water loses heat energy, causing its temperature to drop ...