Answer:
Explanation:
<u>Definition:</u> Noise pollution is generally defined as regular exposure to elevated sound levels that may lead to adverse effects in humans or other living organisms.
<u>Measures to be taken:</u>
- international bodies like the WHO agree that awareness of noise pollution is essential to beat this invisible enemy. For example: avoid very noisy leisure activities, opt for alternatives means of transport such as bicycles or electric vehicles over taking the car, do your housework at recommended times, insulate homes with noise-absorbing materials, etc. Educating the younger generation is also an essential aspect of environmental education.
- Governments can also take measures to ensure correct noise management .
- Close the Windows.
- Put on Earplugs. …
- Improve your Insulation. …
- Invest in Noise-Canceling Headphones. …
- Do Wall-to-Wall Carpeting. …
- Install a Fence. …
- Be Creative with the Office or House Layout. …
- Invest in Noise-Friendly Flooring..
Explanation:
acceleration equation is change in velocity/time
so 100/3 will be 33.3km
Answer: Technician B is right.
Explanation:
Evacuation process is used in refrigeration systems to remove moisture, air and non-profit condensable gases in order to achieve maximum function of the system.
vacuum pump is used to draw the sealed AC system into a vacuum. Evacuation of a refrigerant system also helps to maintain pressure, this is so as pulling a vacuum on the system is simply removing matter (mostly air and nitrogen) from inside the system so that the pressure inside drops below atmospheric pressure.
Answer:
Back spin
Explanation:
A defensive stroke where the ball is struck with a downward and forward motion with a short chopping motion is called Back spin.Backspin is opposite to topspin. Direction of spin imparts and upward force that lift the ball, While a standard strike bounces far forward as up, backspin shots bounce upwards and downwards.