Can humans hear under water?
Sound that’s generated underwater stays underwater; very little sound passes from water to air. When your head is out of the water and you listen to a sound made underwater, you don’t hear much. But if you put your head under the water, the sound becomes much louder.
Can humans hear whales underwater?
Humans can only hear part of the whales’ songs. We aren’t able to hear the lowest of the whale frequencies. Humans hear low frequency sounds starting at about 100 Hz. Researchers have noted that whale songs sound very similar to the songs of hoofed animals, such as.
Why can you hear better when it’s cold?
On a cold day, there tends to be a layer of warmer air above the cold pockets closest to the ground. Because sound moves faster in warm air than colder air, the wave bends away from the warm air and back toward the ground. That’s why sound is able to travel farther in chilly weather.
Does sound travel faster in fog?
Fog contains water droplets that scatter more of the sound energy, thus damping the sound and reducing the distance at which you can hear it. This damp air also has a higher density than dry air, which means that the sound waves can travel more effectively and be heard over a greater distance.
Why is my exhaust louder when it’s cold?
When it is cold, more fuel is added to the air/fuel mixture to make up for the lack of natural vaporisation. So the AFR (air-fuel ratio) is seen by the ECU to be leaner than usual (below the Stoichiometric ratio of 14.7:1) so it compensates for this with extra fuel to make up for the unburned fuel due to the cold.
Why are sounds louder in the cold?
In terms of temperature, sound waves move faster in warm air and slower in cold air. So as sound moves through the atmosphere, some parts of the wave will be moving faster than the rest. This means the sound would be louder and you could hear the traffic noise from farther away.
Why do cold engines need more fuel?
When your car engine is cold, the fuel injectors send more fuel through the system. As the engine warms, it needs less fuel to run efficiently. So the longer you let a cold engine idle, the more fuel you waste and the more you increase the chance of fuel residue build up.
Is cold start bad?
Cold starts cannot be avoided when the engine is cold and you need the car. However a cold start causes more wear than a warm start, and you cannot rev the engine too high unless the oil is warm enough. This will most certainly ruin your car over time.
Do cars get louder with age?
I don’t think it is necessarily true that cars do always get louder as they age. A lot will depend upon how well the car is maintained. However, most modern vehicles have exhaust systems that will be capable of lasting 5 years without noticeable degradation, if not the life of the car.
Does light ever stop traveling?
Answer 2: No, in fact light only stops when it is absorbed by an electron in an atom of an object. Light in a perfect vacuum travels on at its full speed until it hits something.
Does light travel infinitely in space?
In empty space, the wave does not dissipate (grow smaller) no matter how far it travels, because the wave is not interacting with anything else. This is why light from distant stars can travel through space for billions of light-years and still reach us on earth.
Does light lose energy in space?
As light travels away from a galaxy, the Universe is continually expanding, meaning that the distance the light needs to travel is continually increasing as well. As space stretches out underneath a beam of light, its wavelength increases, and its energy decreases.
Why can light travel in a vacuum but sound Cannot?
Light waves are electromagnetic in nature. Thus the light can travel in vacuum. On the other hand, sound waves require a medium for their propagation. They are mechanical waves and cannot travel in vacuum.
How do photons travel in a vacuum?
In empty space (vacuum) all photons travel with the same speed or velocity. Photons are slowed down when they pass through different media such as water, glass or even air. This slowing down accounts for the refraction or bending of light by optical lenses.
Why does light travel in a vacuum?
Photons in the light have the property of particle-wave duality. This means they can behave as both particles and waves. Because of this light does not require a medium for propagation. They can travel through a vacuum.
Does light exist in space?
But inside the solar system, space is filled with light. “So even though space may be full of light, none makes its way to your eye unless you are looking at something bright.”