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Ask QuestionPosted by Adarsh Dubey 5 years, 4 months ago
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Posted by Rajesh Gadsing 5 years, 4 months ago
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Posted by Niharika Sathwika 5 years, 4 months ago
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Swati Garg 5 years, 4 months ago
Yogita Ingle 5 years, 4 months ago
Frictional Force is a force that acts on all moving objects by the surface which it is in contact with. Eg: A ball rolling on the ground encounters friction by the ground surface and it eventually comes to a halt. When the rowing of the boat has stopped, the boat comes to a stop because of the frictional force exerted by water on it. The Frictional force is always in the direction opposite to the applied force.
Gravitational force is a force exerted by the earth on all objects on it. When a ball is thrown up, it falls to the ground because of gravitational force. The water from a tap always flows downwards because of gravitational force.
Posted by Alisha Mehra 5 years, 4 months ago
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Arshan Faraz 5 years, 4 months ago
Gaurav Seth 5 years, 4 months ago
A n s w e r :
An ex officio member is a member of a body (a board, committee, council, etc.) who is part of it by virtue of holding another office. The term ex officio is Latin, meaning literally "from the office", and the sense intended is "by right of office
Posted by Aditya Thakur 5 years, 4 months ago
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Gaurav Seth 5 years, 4 months ago
- Parallelogram: A quadrilateral with each pair of opposite sides parallel.
(1) Opposite sides are equal.
(2) Opposite angles are equal.
(3) Diagonals bisect one another.
- Rhombus: A parallelogram with sides of equal length.
(1) All the properties of a parallelogram.
(2) Diagonals are perpendicular to each other.
- Rectangle: A parallelogram with a right angle.
(1) All the properties of a parallelogram.
(2) Each of the angles is a right angle.
(3) Diagonals are equal. -
- Square: A rectangle with sides of equal length.
(1) All the properties of a parallelogram, rhombus and a rectangle.
- Kite: A quadrilateral with exactly two pairs of equal consecutive sides
(1) The diagonals are perpendicular to one another
(2) One of the diagonals bisects the other.
(3) In the figure
but 
.
- Trapezium: A quadrilateral having exactly one pair of parallel sides.
- Diagonal: A simple closed curve made up of only line segments. A line segment connecting two non-consecutive vertices of a polygon is called diagonal.
- Convex: The measure of each angle is less than
. - Concave: The measure of at least one angle is more than
- Quadrilateral: Polygon having four sides.
- Element of quadrilateral:
(i) Sides: Line segments joining the points.
(ii) Vertices: Point of intersection of two consecutive sides.
(iii) Opposite sides: Two sides of a quadrilateral having no common endpoint.
(iv) Opposite Angles: Two angles of a quadrilateral not having a common arm.
(v) Diagonals: Line segment obtained by joining the opposite vertices.
(vi) Adjacent Angles: Two angles of a quadrilateral having a common arm.
(vii) Adjacent Sides: Two sides of a quadrilateral having a common endpoint.
For ncert exercise copy the given link:
https://mycbseguide.com/blog/ncert-solutions-for-class-8-mathematics/
Posted by Aditya Thakur 5 years, 4 months ago
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Posted by Vidhi Gulgulia 5 years, 4 months ago
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Yogita Ingle 5 years, 4 months ago
Let ones place = x
Tens place = y
number will be = 10y +x
Number after reversing the digits = 10y +x
According to question:
x+y = 12 ⇒ x= 12- y ------(i)
(10y+x) -36 = 10x+y
⇒ 10y +x -10x-y =36 ⇒ 9y - 9x=36 ⇒ y-x=4 ----(ii)
Put the value of (i) in (ii)
y-(12-y)= 4 ⇒ y-12+y = 4 ⇒ 2y= 16 ⇒ y= 8 x= 4
Given number is 10y+x = 10 x 8+4 = 84
Hence, the number is 84
Posted by Aditya Thakur 5 years, 4 months ago
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❖Mʀ᭄ ℟ᴜđʀ₳★ᶠᶠ 5 years, 4 months ago
Yogita Ingle 5 years, 4 months ago
Antibiotics are medicines produced by certain micro-organisms to kill other disease-causing micro-organisms. Precautions to be taken while using antibiotics are:
i. Antibiotics should be taken under the supervision of a well qualified doctor.
ii. Course (intake) of antibiotics should be completed as prescribed by the doctor.
iii. Antibiotics should be taken in the right amount and at the right time. A wrong dose of antibiotics makes the drug ineffective. Also, excessive consumption of drugs may kill the useful bacteria present in our body.
Posted by Mahak♥️ Gupta 5 years, 4 months ago
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Posted by Manoj Edvani 5 years, 4 months ago
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Yogita Ingle 5 years, 4 months ago
Which among these is not a perfect square? a. 225/729 b. 1.96 c. 624 d. 1600
624 is not a perfect square.
Posted by Aditya Thakur 5 years, 4 months ago
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Yogita Ingle 5 years, 4 months ago
- Opposite sides are parallel and congruent
- Opposite angles are congruent
- Consecutive angles are supplementary
- Diagonals bisect each other
Posted by Amrita M Nambiar 5 years, 4 months ago
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Posted by Dinesh Gujjar 5 years, 4 months ago
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Yogita Ingle 5 years, 4 months ago
Iron Symbol Fe
Iron is a metal, an element of group VIII of the periodic table. It is a lustrous, ductile, malleable, silver-grey in colour. It is the tenth most abundant element in the universe. It is found in a major amount at the core of the Earth in a molten form.
Posted by Vidhi Khandelwal 5 years, 4 months ago
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Ayush Dixit 5 years, 4 months ago
Posted by Prince Sarkar 5 years, 4 months ago
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Abhi Yuki 5 years, 4 months ago
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Posted by Akshaya Reddy Reddygaari G8 5 years, 4 months ago
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Gaurav Seth 5 years, 4 months ago
- The process of loosening and turning the soil is called
(a) Broadcasting
(b) Irrigation
(c) Ploughing
(d) Levelling
- The organic substance obtained from dead plants and animal wastes is
(a) Manure
(b) Fertilizer
(c) Irrigation
(d) Agriculture
- In which of the following methods of irrigation rotating nozzles are used?
(a) Moat
(b) Drip system
(c) Chain Pump
(d) Sprinkler system
- The management and care of farm animals by humans for profit is known as
(a) Granary
(b) Animal Husbandry
(c) Poultry farm
(d) Warehouse
- The process of separating grain from chaff is called
(a) Threshing
(b) Weeding
(c) Sowing
(d) Winnowing
- Weeds can be removed by using.
(a) Pesticides
(b) Fungicides
(c) Weedicides
(d) Bactericides
- The conversion of nitrogen into nitrates is known as
(a) Nitrogen fixation
(b) Ammonification
(c) Nitrate Assimilation
(d) Nitrogen cycle
- Animals like horse, donkey that carries load are called
(a) Drought species
(b) Load carrying Animals
(c) Dairy Animals
(d) Draught Animal
- Raising of fish in inland waters and coastal waters are called
(a) Pisciculture
(b) Fishery
(c) fish culture
(d) harvesting
Answers
- (c) Ploughing
- (a) Manure
- (d) Sprinkler system
- (b) Animal Husbandry
- (a) Threshing
- (c) Weedicides
- (a) Nitrogen fixation
- (b) Load carrying Animals
- (a) Pisciculture
Posted by Malay Kumar 5 years, 4 months ago
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Shatadhara Majumder 5 years, 4 months ago
Posted by Ganesh Srinivasan 5 years, 4 months ago
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Posted by Kanha Mahala 5 years, 4 months ago
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Amrit Kumar Narayan 5 years, 4 months ago
Gaurav Seth 5 years, 4 months ago
Viruses:
- Viruses are smaller than any known cell.
- Viruses can only be seen with electron microscope.
- Viruses can reproduce only inside the bodies of other organisms, which mean they need a host.
- A virus is like a non- living thing outside the body of other organisms. Therefore, it is a borderline between a living and a non- living thing.
Posted by Amrita Sahoo 5 years, 4 months ago
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Posted by Øm Kümãr 5 years, 4 months ago
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Yogita Ingle 5 years, 4 months ago
8x –4+11x+(–14)
= 8x - 4 + 11x - 14
=8x + 11x - 4 - 14
= 19x - 18
Posted by Av Vashisht 5 years, 4 months ago
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Gaurav Seth 5 years, 4 months ago
Probability:
Probability is defined as the numerical method of measuring uncertainty involved in a situation.
It is widely used in the study of mathematics, statistics, gambling, physical science, biological science, weather forecasting, finance etc. to draw conclusions.
Posted by Avneet Chouhan 5 years, 4 months ago
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Posted by Avneet Chouhan 5 years, 4 months ago
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Posted by Avneet Chouhan 5 years, 4 months ago
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