Answer:Electricity is the flow of electrons. All matter is made up of atoms, and an atom has a center, called a nucleus. When electrons are "lost" from an atom, the free movement of these electrons constitutes an electric current. Electricity is a basic part of nature and it is one of our most widely used forms of energy.
Explanation:
Answer:
When a baseball is pitched, hit and flies in the air, one or more of the physical principles formulated over 300 years ago by Sir Isaac Newton act on it. Folklore tells how the mathematician and physicist first realized the law of gravity while observing a falling apple. Had Newton watched a baseball game instead, he might have formulated all three laws of motion by the seventh-inning stretch.
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A possible source of indoor air pollution is a gas present in some carpets and furniture, which is Formaldehyde and VOCs .
Formaldehyde can cause Cancer due to its exposure through the Furniture. These cause pollution inside the room acting as Indoor Air pollution gas.
By the end of seven days the concentration of formaldehyde in household furniture can be brought back to normal in most of the cases.
Whereas it is also known that it takes about two years for a well furnished newly made home to bring down the levels of evolved gas i.e. formaldehyde.
The following types of cancers are prone due to Formaldehyde:
- Nose
- Throat
- Sinus
Some Volatile Organic Compounds (VOCs) are found in desks in office, cabinet furniture and several products available as furniture. These chemicals are used in manufacture of new carpets harming our health.
VOCs can be removed by using hot water of the given carpet. These cause pollution inside the room acting as Indoor Air pollution gas.
It usually takes two to three days to evolve off the gas.
Hence, a possible source of indoor air pollution is a gas present in some carpets and furniture, which is Formaldehyde and VOCs .
Learn more about Formaldehyde here, brainly.com/question/14299220
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B because there is no energy emitted
Answer:
Explanation:
We know that , for an object to remain in circular motion , a force towards centre is required which is called centripetal force. In the circular motion of
satellites around planet , this force is provided by the gravitational attraction between satellite and planet.
If M be the mass of planet and m be the mass of satellite, G be gravitational constant and R be the distance between planet and satellite or R be the radius of orbit
Gravitational force = G Mm / R²
If v be the velocity with which satellite is orbiting
centripetal force
= m v² /R
Centripetal force = gravitational attraction
m v² /R = G Mm / R²
v = ![\sqrt{\frac{GM}{R} }](https://tex.z-dn.net/?f=%5Csqrt%7B%5Cfrac%7BGM%7D%7BR%7D%20%7D)
Time period = time the satellite takes to make one rotation
= distance / orbital velocity
= 2πR/ v
= ![\frac{2\pi R\sqrt{R} }{\sqrt{GM} }](https://tex.z-dn.net/?f=%5Cfrac%7B2%5Cpi%20R%5Csqrt%7BR%7D%20%7D%7B%5Csqrt%7BGM%7D%20%7D)
T = ![\frac{2\pi R^\frac{3}{2} }{\sqrt{GM} }](https://tex.z-dn.net/?f=%5Cfrac%7B2%5Cpi%20R%5E%5Cfrac%7B3%7D%7B2%7D%20%7D%7B%5Csqrt%7BGM%7D%20%7D)