SHORT ANSWER QUESTIONS
1.
How is sound produced?
2.
Define the time period of a vibrating object.
3. What is amplitude?
4. How is sound produced in our throat?
5. What do you mean by noise pollution?
6. List various ill effects that noise pollution causes
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Answers
Answer:
The main source of raw materials to major industries such as cotton and jute fabric, sugar, tobacco, edible as well as non-edible oils is agriculture. Moreover, many other industries such as processing of fruits as well as vegetables and rice husking get their raw material mainly from agriculture.
Answer:
1. Sound is produced when an object vibrates, creating a pressure wave. This pressure wave causes particles in the surrounding medium (air, water, or solid) to have vibrational motion. ... The human ear detects sound waves when vibrating air particles vibrate small parts within the ear.
2 . A time period (denoted by 'T' ) is the time taken for one complete cycle of vibration to pass a given point. As the frequency of a wave increases, the time period of the wave decreases. The unit for time period is 'seconds'.
3. the greatest distance that a wave, especially a sound or radio wave, moves up and down
4. The vocal folds (vocal cords) are attached within the larynx to the largest of the laryngeal cartilages known as the thyroid cartilage or "Adam's apple". The vocal folds produce sound when they come together and then vibrate as air passes through them during exhalation of air from the lungs.
5. Noise pollution can be defined as any disturbing or unwanted noise that interferes or harms humans or wildlife. Noise pollution has a negative impact on wildlife species by reducing habitat quality, increasing stress levels, and masking other sounds. ...
6. Exposure to prolonged or excessive noise has been shown to cause a range of health problems ranging from stress, poor concentration, productivity losses in the workplace, and communication difficulties and fatigue from lack of sleep, to more serious issues such as cardiovascular disease, cognitive impairment, tinnitus ...