Sea has no colour

Cleaning

In objects with parts that are difficult to reach, for example spiral tubes and electronic components, the process of ultrasonic cleaning is used. Here, the object is dipped in a solution of suitable cleaning material and ultrasonic waves are passed into it. As a result of this, high frequency waves are generated that cause the dirt and grease to detach from the surface.

Detection of cracks

Ultrasound is used to detect cracks in the metallic components that are used in the construction of high rise structures such as buildings and bridges. They generate and display an ultrasonic waveform that is interpreted by a trained operator, often with the aid of analysis software, to locate and categorize flaws in test pieces. High frequency sound waves reflect from flaws in predictable ways, producing distinctive echo patterns that can be displayed and recorded by portable instruments. A trained operator identifies specific echo patterns corresponding to the echo response from good parts and from representative flaws. The echo pattern from a test piece may then be compared to the patterns from these calibration standards to determine its condition.

Echocardiography

In the process of electrocardiography, the ultrasonic waves are used to form an image of the heart using reflection and detection of these waves from various parts.

Ultrasonography

Medical ultrasound is a diagnostic imaging technique based on ultrasound. It is used for the imaging of internal body structures such as muscles, joints and internal organs. Ultrasonic images are known as sonograms. In this process, pulses of ultrasound are sent to the tissue using a probe. The sound echoes off the tissue, where different tissues reflect sound varying in degrees. These echoes are recorded and displayed an image.

Lithotripsy

Ultrasonic waves are used to break stones in the kidney. High-energy sound waves are passed through the body without injuring it and break the stone into small pieces. These small pieces move through the urinary tract and out of the body more easily than a large stone.

SONAR

SONAR, sound navigation and ranging is a technique in which sound waves are used to navigate, detect and communicate  under the surface of the water.

Echolocation

Echolocation is the process where sound waves and echoes are used to determine objects in space. Echolocation is used by bats to navigate and find their food in the dark. Bats send out sound waves from their mouth and nose, which then hit the objects in their vicinity producing echoes, which are then received by the bats. The nature of the echo helps them determine the size, the shape and the distance of the object.

The period following the onset of puberty during which a young person develops from a child into an adult.

Eye color is the result of variations in the amount of melanin, a pigment found in the front part of the iris of the eye. The lack of this pigment results in blue eyes, some pigment gives green and lots of pigment gives brown eyes. So light brown eyes just have a bit less melanin than darker brown eyes.

It is difficult to walk on smooth and wet floor because the friction is less and the required grip is not available so, sometimes we slip on wet floor........... It is difficult to walk on a smooth or wet floor because friction is very less .

Sorry because friction is very less

Because friction is very le

Human Eye Anatomy (seen from above) Eye anatomy

When surveyed about the five senses — sight, hearing, taste, smell and touch — people consistently report that their eyesight is the mode of perception they value (and fear losing) most. Despite this, many people don't have a good understanding of the anatomy of the eye, how vision works, and health problems that can affect the eye. Read on for a basic description and explanation of the structure (anatomy) of your eyes and how they work (function) to help you see clearly and interact with your world. How The Eye Works In a number of ways, the human eye works much like a digital camera: Light is focused primarily by the cornea — the clear front surface of the eye, which acts like a camera lens. The iris of the eye functions like the diaphragm of a camera, controlling the amount of light reaching the back of the eye by automatically adjusting the size of the pupil (aperture). The eye's crystalline lens is located directly behind the pupil and further focuses light. Through a process called accommodation, this lens helps the eye automatically focus on near and approaching objects, like an autofocus camera lens. Light focused by the cornea and crystalline lens (and limited by the iris and pupil) then reaches the retina — the light-sensitive inner lining of the back of the eye. The retina acts like an electronic image sensor of a digital camera, converting optical images into electronic signals. The optic nerve then transmits these signals to the visual cortex —

The root of tress collect the soil together .so the soil doesn't move with water . That's why deforestation causes floods.

A solar system consist of planets , satellites , sun , and other celestial body.

The pascal (symbol: Pa) is the SI derived unit of pressure used to quantify internal pressure. It is defined as one newton per square metre. It is named after the French polymath Blaise Pascal.

Philosophy+Logic+ Analysis+ Spirituality+ Curiosity

Science is like a universe it can't be defined

If the pipe is straight it travels straight

Sorry half answer is send by me so let complete the answer Adolescence starts at the age of 11-12 and lasts up at the age of 18-19.

The period of life when the body undergoes change to reproductive maturity is called adolescence. Adolescence starts

Adolescence the period of life when the body undergoes changes leading to reproductive maturity.

Because CNG is less polluting then other fuel