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Midpoint theoram

Posted by Yogesh Kumar 5 years, 4 months ago

1 answers

Vaishu ? 5 years, 4 months ago

The midpoint theorem states that the line segment in a triangle joining the midpoint of two sides of the triangle is said to be parallel to its third side and is also half of the length of the third side.

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If x+y=3 and 3x+2y=4 the value of negative of x is

Posted by Arham Hussain 5 years, 4 months ago

CBSE > Class 10 > Mathematics

5 answers

Sushant Sharma 5 years, 4 months ago

We have x+y=3 ----------(i) and. 3x+2y=4 --_------(ii) From eq-(i). we'll get y=3-x -----(iii) Now put the value in eq-(ii) We ll get ,,,,, ::. :: 3x+2(3-x)=4 3x+6-2x=4 3x-2x=4-6 x=-2 Hurray ?????We solve it

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King Adithya H M... 5 years, 4 months ago

x = -2

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Paul Mongku 5 years, 4 months ago

By method of elimination Let, x+y=3......(1) 3x+2y=4.....(2) Multiply (1) by 3 we get, 3x+3y=9......(3) Now, subtract (2)from(3) 3x+3y= 9 - 3x+2y= 4 - - ______________ Y=5.....(4) Again substitute (4) in (1) we get, x+5=3 x =3-5 x = -2 ....ans

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Yogita Ingle 5 years, 4 months ago

x+y=3 -------- (i)

3x+2y=4 ......... (ii)

Multiply (i) by 2 and subtract from (ii)

3x + 2y = 4

2x + 2y = 6

____________

x = -2

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Arham Hussain 5 years, 4 months ago

-2

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ANSWER

1.Which of the statements about the reaction below are incorrect?2PbO(s) + C(s) ® 2Pb(s) + CO2(g)(a)Lead is getting reduced.(b)Carbon dioxide is getting oxidised.(c)Carbon is getting oxidised.(d)Lead oxide is getting reduced.(i)(a) and (b)(ii)(a) and (c)(iii)(a), (b) and (c)(iv)all

Posted by Rishabh Pawar 5 years, 4 months ago

CBSE > Class 10 > Science

2 answers

Sanchita Prakash 5 years, 4 months ago

a and b

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Vaishu ? 5 years, 4 months ago

(i) (a) and (b) is answer.

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2. Define the unit of current. Ans. SI unit of electric current is Ampere. Current is said to be 1 ampere, if 1 coulomb charge flows per second across a cross-section of conductor. 3. Calculate the number of electrons constituting one coulomb of charge. Ans. Charge on one electron = 1.6 x 10-19coulomb. No of electron in one coulomb of charge = 1/1.6 x 10-19 = 6.25 x 1018 electrons. Page No. 202 1. Name a device that helps to maintain a potential difference between across a conductor. Ans. Battery 2. What is meant by saying that the potential difference between two points is 1 v? Ans. The potential difference between two points is said to be 1 volt, if 1 joule of work is to be done for moving charge of 1 coulomb from one point to another. 3. How much energy is given to each coulomb of charge passing through a 6-volt battery? Ans. Potential difference (V) = 6 V Charge (Q) = 1 C Energy = total work done (W) = Q x V = 1x6 = 6 joule. Page No. 209 1. On what factor does the resistance of a conductor depend? Ans. The resistance of a conductor depends on i. length of conductor (l) ii. Area of cross-section (A) iii. Temperature iv. Nature of material used to make conductor 2. Will current flow more easily through a thick wire or a thin wire of the same material, when connected to the same source? Why? Ans. The current flows more easily through a thick wire as compared to thin wire of the same material, when connected to the same source. It is due to the reason that resistance increases with decrease in thickness. 3. Let the resistance of an electric component remains constant while the potential difference across the two ends of the component decreases to half of its former value. What change will occur in the current through it? Ans. It is given that resistance R of the electrical component remains constant but the potential difference across the ends of the component decreases to half of its value. Hence, as per Ohm’s law, new current also decreases to half of its original value. 4. Why are coils of electric toasters and electric irons made of an alloy rather than a pure metal? Ans. Coils of electric toasters and electric irons are made of an alloy due to the following reasons: i. Resistivity of an alloy is generally higher than that of pure metal. ii. At high temperature, an alloy does not oxidize readily. Hence, coil of an alloy has longer life. 5. Use the data in Table 12.2 to answer the following: (a) Which among iron and mercury is a better conductor? (b) Which material is the best conductor? Ans. (a) Iron is the better conductor than mercury. (b) Silver is the best conductor because its resistivity is the least. Page No. 213 1. Draw a schematic diagram of a circuit consisting of a battery of three cells of 2 V, each, a 5 Ώ resistor, 8 Ώ resistors and a 12 Ώ and a plug key, all connected in series. Ans. The schematic diagram of circuit is as follows: 2. Redraw the circuit of question 1, putting in an ammeter to measure the current through the resistors and a voltmeter to measure the potential difference across the 12 Ώ resistors. What would be the reading in the ammeter and voltmeter? Ans. Here ammeter A has been joined in series of circuit and voltmeter V is joined in parallel to 12 ohms’ resistor. Total voltage of battery V = 3x2 = 6 V. Total resistance R = R1+ R2+ R3 = 5 Ω +8 Ω +12 Ω = 25 Ω Ammeter reading (current) = I = V/R = 6/25 = 0.24 A. Voltmeter reading = IR = 0.24 x 12 = 2.88 V.

Posted by Rishabh Pawar 5 years, 4 months ago

CBSE > Class 10 > Science

2 answers

King Adithya H M... 5 years, 4 months ago

Thanks for giving Question & Answer

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Vaishu ? 5 years, 4 months ago

Thanks for your question+ answer

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ANSWER

1. What does an electric circuit mean? Ans. An electric circuit is a continuous and closed path of an electric current. If the electric circuit complete, current can flow through the circuit.

Posted by Rishabh Pawar 5 years, 4 months ago

CBSE > Class 10 > Science

5 answers

King Adithya H M... 5 years, 4 months ago

Thanks for giving Question & Answer

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Vaishu ? 5 years, 4 months ago

?? phir padhaai koi nahi karta .

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Akhya Sahay 5 years, 4 months ago

Kaash boards m v tmhare hi jaisa ques pucha jata... Ques k sath ans attached ??

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Vaishu ? 5 years, 4 months ago

? What is this answer is already given in Question?? ?

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Yogita Ingle 5 years, 4 months ago

A continuous and closed path of an electric current is called an electric circuit. An electric circuit consists of electric devices, source of electricity and wires that are connected with the help of a switch.

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How many cells in our Excel sheet in horizontally and vertically ??

Posted by Ritika Ritika 5 years, 4 months ago

CBSE > Class 10 > Information Technology (402)

2 answers

Yogita Ingle 5 years, 4 months ago

Rows are numbered numerically from top to bottom while Columns Columns are referred by alpha characters from left to right. In Excel 2007, there are 65536 Rows which are numbered as 1, 2, 3, … 65,536. These numbers are shown on the left most portion of the worksheet. Columns Columns (total 256 in Excel) are identified by letters, such as A, B, C,.. AA… IV, and are shown on the horizontal box just above Row 1. Thus, there are 65,536  256 = 1,65,00,000, approximately cells, which is indeed a huge work area, sufficient for all application requirements in one sheet.

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Ritika Ritika 5 years, 4 months ago

Can anyone tell me the answer of this question

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ANSWER

The substances that undergo chemical change in the reaction (1.1), magnesium and oxygen, are the reactants. The new substance is magnesium oxide, formed during the reaction, as a product.

Posted by Rishabh Pawar 5 years, 4 months ago

CBSE > Class 10 > Science

3 answers

Vaishu ? 5 years, 4 months ago

Ya, Magnesium ribbon burn with dazzling white light to give white substance called magnesium oxide.

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Ritika Ritika 5 years, 4 months ago

Yes

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Kumari Shalini 5 years, 4 months ago

Yaa right.... It's correct

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ANSWER

How many cells in excel our sheet horizontally and vertically ?

Posted by Ritika Ritika 5 years, 4 months ago

CBSE > Class 10 > Home Science

1 answers

Yogita Ingle 5 years, 4 months ago

0Thank You

ANSWER

How to draw dot structure of Hcl molecule??

Posted by Kumari Shalini 5 years, 4 months ago

CBSE > Class 10 > Science

2 answers

Aryan Dargan??? 5 years, 4 months ago

Cl will share one electron with H.

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Vaishu ? 5 years, 4 months ago

Sorry unable to upload image here.

1Thank You

ANSWER

CaSO.12HO+112HOCaSO.2HO42242(PlasterofParis)Gypsum)

Posted by Rishabh Pawar 5 years, 4 months ago

CBSE > Class 10 > Science

1 answers

Kumari Shalini 5 years, 4 months ago

Your way of writing the question is really very strange... I am unable to understand what you have written here... I don't think your chemical formula of gypsum and plaster of paris is correct... Please write your questions carefully...

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ANSWER

Letter to editor in odia

Posted by Jyotirmayee Bhanja 5 years, 4 months ago

CBSE > Class 10 > Other Subjects

0 answers

ANSWER

Mention any three sources of interlinking between the nation during the ancient times?

Posted by Sneha Varma 5 years, 4 months ago

CBSE > Class 10 > Social Science

1 answers

Yogita Ingle 5 years, 4 months ago

1. Silk routes – They are a good example of vibrant pre modern trade and cultural links between distant parts of the world. The name ‘silk route’ denotes the importance of West bound Chinese silk cargoes along this route.

2. Food travels – Food offers many examples of long distance cultural exchange. Traders and travelers introduced new crops to the lands they travelled. It is believed that ‘noodles’ travelled west from China to become spaghetti.

3. Conquest, disease and trade – The pre modern world shrank greatly in the 16thcentury after European sailors found a sea route to Asia and also successfully crossed the western ocean to America. The Entry of Europeans helped expand or redirect some of these flows towards Europe.

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Telugu guide

Posted by Dddddddddd Aaaaaaaaaa 5 years, 4 months ago

CBSE > Class 10 > Regional Language

4 answers

Gowtham Kotam 5 years, 4 months ago

రామాయణం మెటిరియల్ ఉంటె నాకు పంపు.

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Gowtham Kotam 5 years, 4 months ago

వెన్నెల

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Gowtham Kotam 5 years, 4 months ago

జానపదుని జాబు

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Naveen Kumar 5 years, 4 months ago

మాతృభావన

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You already know that acids are sour in taste and change the colourof blue litmus to red, whereas, bases are bitter and change the colour ofthe red litmus to blue. Litmus is a natural indicator, turmeric is anothersuch indicator. Have you noticed that a stain of curry on a white clothbecomes reddish-brown when soap, which is basic in nature, is scrubbedon it? It turns yellow again when the cloth is washed with plenty ofwater. You can also use synthetic indicators such as methyl orange andphenolphthalein to test for acids and bases.

Posted by Rishabh Pawar 5 years, 4 months ago

CBSE > Class 10 > Science

1 answers

Kumari Shalini 5 years, 4 months ago

Yes, you have written correct statement regarding the change of indicators in acidic and basic nature..

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ANSWER

Difference between few, a few and the few

Posted by Disha Singh 5 years, 4 months ago

CBSE > Class 10 > English Language and Literature

1 answers

Vaishu ? 5 years, 4 months ago

•Few means not many (people or things).It is used to say that there are not a lot of people or things. •A few means some (people or things). It is used to say that there are a small number of people or things.•The few - used in minority form

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50 inside questions of chapter 1

Posted by Sweety Kumari Sweety Kumari 5 years, 4 months ago

CBSE > Class 10 > Information Technology (402)

1 answers

Ankit Kumar 5 years, 4 months ago

Hlw

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What is the never between 0 and 1

Posted by Jesh . 5 years, 4 months ago

CBSE > Class 10 > Mathematics

2 answers

Vaishu ? 5 years, 4 months ago

Infact their are many numbers

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Vaishu ? 5 years, 4 months ago

7.6 is the number which is never between 0&1.

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ANSWER

write a javascript code to input your name,residential address,and telephone number and display them on separate lines

Posted by Mamta Chakraborty Sarmah 5 years, 4 months ago

CBSE > Class 10 > Computer Applications (165)

1 answers

Parveen Gautam 5 years, 4 months ago

Shhs

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ANSWER

Class 10 tignomatry formula

Posted by Bhupendra Dhapkari 5 years, 4 months ago

CBSE > Class 10 > Mathematics

1 answers

Vaishu ? 5 years, 4 months ago

•sin θ = Opposite Side/Hypotenuse •cos θ = Adjacent Side/Hypotenuse •tan θ = Opposite Side/Adjacent Side •sec θ = Hypotenuse/Adjacent Side •cosec θ = Hypotenuse/Opposite Side •cot θ = Adjacent Side/Opposite Side •cosec θ = 1/sin θ •sec θ = 1/cos θ •cot θ = 1/tan θ •sin θ = 1/cosec θ •cos θ = 1/sec θ •tan θ = 1/cot θ

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केषा माला

Posted by Vanshaj Singh 5 years, 4 months ago

CBSE > Class 10 > संस्कृत (शेमुषी)

1 answers

Raman Thakur 5 years, 4 months ago

Ch- 5 solution

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ANSWER

What is the ph value of dilute ethaonic acid

Posted by Nandini Soni 5 years, 4 months ago

CBSE > Class 10 > Science

2 answers

Kumari Shalini 5 years, 4 months ago

The pH value of dilute ethanoic acid is approximately 3 .... Which is less than seven making it acidic in nature...

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Yogita Ingle 5 years, 4 months ago

The pH of dilute solutions of hydrochloric acid, ethanoic acid and lemon juice is less than 7 and therefore, they are acidic in nature.

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ANSWER

A 52-year old near-sighted person wears eye-glass with a power of -5.5 dioptres for distance viewing. His doctor prescribes a correction of +1.5 dioptres in the near-vision section of his bi-focals. This is measured relative to the main part of the lens (i) What is the focal length of his distance-viewing part of the lens? (ii) What is the focal length of the near-vision section of the lens? (5 Mark question)

Posted by Vidhya Vijay Baskar 5 years, 4 months ago

CBSE > Class 10 > Science

0 answers

ANSWER

No resources are there in regional language.

Posted by Shashank Agasagi 5 years, 4 months ago

CBSE > Class 10 > Regional Language

1 answers

King Adithya H M... 5 years, 4 months ago

Yes,No resources are there in regional language.

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ANSWER

Class 10 maths ch 15 formula

Posted by Chirag Prajapati 5 years, 4 months ago

CBSE > Class 10 > Mathematics

2 answers

Chirag Prajapati 5 years, 4 months ago

Gando

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Vaishu ? 5 years, 4 months ago

1) Probability =( No. of the favourable outcomes)÷ (number of all possible outcomes). 2) Probability of event,P(E) + Probability of an event not happening, P(Ē) = 1

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ANSWER

The british had left behind

Posted by Rahul Joshi 5 years, 4 months ago

CBSE > Class 10 > English Language and Literature

1 answers

Vaishu ? 5 years, 4 months ago

So what you what to ask?

2Thank You

ANSWER

Although averages are useful for comparing countries they hide disparities analyse

Posted by Bhakti Sule 5 years, 4 months ago

CBSE > Class 10 > Social Science

1 answers

Yogita Ingle 5 years, 4 months ago

Averages used to compare countries because they give average earning of the citizen in the country.
The only problem in averages is that they hide disparities.
For example, in the table above
Both countries have the Average of 50000 but Country A is more developed because it has equal sharing.
Thus by seeing averages it might hide such disparities in share of income

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ANSWER

what do you mean ty Transportation

Posted by Rohit Sutar 5 years, 4 months ago

CBSE > Class 10 > Social Science

1 answers

Yogita Ingle 5 years, 4 months ago

Transportation can be defined as the movement of any substance from one place to another.
Water and nutrients required for all metabolic activities should be transported in the body of plants and animals.
The waste material or excretory products should also move to the region of excretion.
Transportation in animal takes place through circulatory system which includes blood, blood vessels and heart.

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What is a syllabus of IT

Posted by Hema Pandey 5 years, 4 months ago

CBSE > Class 10 > Information Technology (402)

1 answers

Abhishek Baghel 5 years, 4 months ago

Don't know

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ANSWER

What is a balance chemical equation

Posted by Sonia Atom 5 years, 4 months ago

CBSE > Class 10 > Science

3 answers

Kumari Shalini 5 years, 4 months ago

A chemical equation that has equal number of atoms in reactant side as well as product side, is called a balanced chemical equation...

1Thank You

Hidha Nazrin 5 years, 4 months ago

if the atomic number of reactant and product are equally balanced type of chemical equations are called balanced chemical equations...hope u can understand

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Mamta ... 5 years, 4 months ago

A balanced chemical equation is an equation that have equal numbers of each type of atom on both sides of the arrow......hope this helps uhh?

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ANSWER

What is great depression in India

Posted by Ayushi Dixit 5 years, 4 months ago

CBSE > Class 10 > Social Science

2 answers

Yogita Ingle 5 years, 4 months ago

The Great Depression began in 1929. India was an exporter of wheat to European countries. When the international prices of wheat crashed because of the Great Depression, prices of wheat in India fell almost by 50%. Peasants and farmers were the worst sufferers. While the prices of the crops declined, the government refused to reduce the revenues. This forced the peasants to borrow money from the moneylenders. At this time in India, the peasants’ indebtedness increased.

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Manav Nashier 5 years, 4 months ago

What

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