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Meghna Thapar 5 years, 11 months ago
The friction whenever an object moves through a fluid is called fluid friction. Liquids and gases are fluids. Air exerts frictional force on cars, buses, aeroplanes, rockets, birds, etc. moving through it. Water exerts frictional force on objects like boats, speedboats, ships, fish, etc. which move through it.
The force which always opposes the motion of one body over another body is called frictional force or friction.
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Gaurav Seth 6 years, 10 months ago
Direct variation:
If two quantities increase or decrease together in such a
manner that the ratio of their corresponding values remain constant, we say that the two quantities vary directly.
In other words x and y are said to vary directly if X/y = k
, where k is a positive constant.
In direct Proportion
x/y= k
x=ky
So we can find value of k from known values, and then use the
formula to calculate the unknown values
Inverse variation:
Two quantities x and y are said to vary inversely or
indirectly if an increase in x causes a
decrease in y and a decrease in X causes an increase in y in such a way that xy
remains constant.
In other words x and y are said to vary indirectly if x y =
k, where K is a positive constant.
In inverse Proportion
xy= k
x=k/y
So we can find value of k from known values, and then use the
formula to calculate the unknown values
When two quantities x and y are in direct
proportion (or vary directly) they are also written as x∝y.
When two quantities x and y are in inverse proportion (or vary inversely) they are also
written as x∝ 1/y
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Solution:
Let the charges be x1 , x2, x3, x4
x1= 60/4= 15
X2= 100/8= 12.50
X3=140/12= 11.67
X4= 180/24= 7.50
x1 ≠ x2 ≠ x3 ≠ x4
Here, The charges per hour are not same ,
Hence the parking charges are not in direct proportion to the parking time.
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Gaurav Seth 6 years, 10 months ago
The British changed their policies as a result of rebellion of 1857 in these ways.
1) British queen Elizabeth I took charge of administration and British Parliament passed an act in 1859. The powers of the East India Company were taken back and transferred to the British crown.
2) The rulers of Indian princely states were given assurance that their territories would not be annexed by the British. But the Indian rulers had to be loyal towards the British crown.
3) The British assured the land owners by making policies which protect their land.
4) The British reorganized their army by reducing the number of Indian soldiers and increasing the number of European soldiers.
5) The British decided to respect the customary religions and social practices of the people in India.
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