CBSE > Class 08 | CBSE Board | Homework Help

Pole star is a star that appears stationary to our earth. Other stars move from west to east as our earth move from east to west but pole star(dhruv tara) is the only star which appears stationary to us because it lies on the orbit of the earth.

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Calorific value

Posted by Singh Apple Notebook Pvt. Ltd. 7 years ago

CBSE > Class 08 > Science

3 answers

Kanvi ..?? 7 years ago

Calorific value of a fuel is defined as the amount of heat produced in kilojoules when one gram of a fuel is completely burned.The unit for representing calorific value is kolojoules(kJ).Calorific value is expressed in kJ/g.

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Anupam Mishra 7 years ago

Kilogram per joule kg/j

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Nagaraju Iragaraju 7 years ago

The units of calorific value units are kilojoule per kg

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Explain any 4 features of microsoft access

Posted by Suramya Parashari 7 years ago

CBSE > Class 08 > Other Subjects

1 answers

Harsh Kumawat 7 years ago

the for feature of computer are

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P=1000 R=8% T=1 Find simple and compound interest

Posted by Shreya Bhalerao 7 years ago

CBSE > Class 08 > Mathematics

5 answers

Rashi Aggarwal 7 years ago

Simlpe interedt is 80

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Anupam Mishra 7 years ago

S.I. is also80

1Thank You

Anupam Mishra 7 years ago

C.I.= 80

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Ckt Beniwal 7 years ago

A = p(1+r/100)^n for C.I

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Ckt Beniwal 7 years ago

Use p×r×t/100 for simple interest

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What is fluid and frictional force??

Posted by Bhavika Phophalia 7 years ago

CBSE > Class 08 > Science

1 answers

Meghna Thapar 6 years, 1 month 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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A hostel had provisions for 150 students for 45 days. After 10 days 25 students left the hostel. How long will the food last at the same rate??

Posted by Bhavika Phophalia 7 years ago

CBSE > Class 08 > Mathematics

3 answers

Prisha Gupta 7 years ago

Sorry * BOOK

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Prisha Gupta 7 years ago

Which booh???

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Ckt Beniwal 7 years ago

See chapter 13, example 8

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Factorise:- 6x6 - 21x4 -12x² 81x4 - y4

Posted by Bhavika Phophalia 7 years ago

CBSE > Class 08 > Mathematics

0 answers

ANSWER

If [ax³+(2)²]=a²x6+x³+4 , find the value of a

Posted by Bhavika Phophalia 7 years ago

CBSE > Class 08 > Mathematics

0 answers

ANSWER

In a parallelogram the base is x²+2-3x and the area is 2-3x²+x-3x³+x4, then find the value of height

Posted by Bhavika Phophalia 7 years ago

CBSE > Class 08 > Mathematics

0 answers

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विलोम शब्द 'विषम'

Posted by Janvi Parjapati 7 years ago

CBSE > Class 08 > Other Subjects

0 answers

ANSWER

Describe how equality of access and useis basic feature of public facilities

Posted by Arpana Kumari 7 years ago

CBSE > Class 08 > Social Science

0 answers

ANSWER

Why do earthquake occur

Posted by Ritik Rqj 7 years ago

CBSE > Class 08 > Science

2 answers

Arpan Tiru 7 years ago

earthquake occur because of sudden shaking or trembling of the plates of ?

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Surya Pratap 7 years ago

When are disbalanced then earthquakes occure

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(A+B)^2=?

Posted by Akhil Kumar 7 years ago

CBSE > Class 08 > Mathematics

1 answers

Saurabh Kumar 7 years ago

a^2 + 2ab + b^2

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Following are the car parking charges near a railway station upto 4hrs Rs 60 8 hrs Rs 100 12hrs Rs 140 24hrs Rs180 Check if the parking chargess are direct proportion to the parking time

Posted by Martin John 7 years ago

CBSE > Class 08 > Mathematics

1 answers

Gaurav Seth 7 years 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

==========================================================

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.

3Thank You

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What is contact force?

Posted by Ankush From Bhind 7 years ago

CBSE > Class 08 > Science

3 answers

Arpan Tiru 7 years ago

The force which is developed when it is in contact with an object. It is divided into 2 forces 1)muscular force 2)frictional force

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Lakshay Jain 7 years ago

It is the type of force in which act when to surface touch each other

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Tanjil Wazed 7 years ago

The force in which two bodies come in contact or touch with each other is called contact force

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History ch 10 painting history

Posted by Vaibhav Jain 7 years ago

CBSE > Class 08 > Social Science

0 answers

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Social hindi mai ho sakti hai

Posted by Rajesh Kumar 7 years ago

CBSE > Class 08 > Social Science

0 answers

ANSWER

In what ways did the British change their policies as a result of rebellion of 1857

Posted by Aarav Kumar 7 years ago

CBSE > Class 08 > Social Science

4 answers

Nandini Nayal 7 years ago

It's LENGTHY

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Aarav Kumar 7 years ago

Meaning less answer

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Aarav Kumar 7 years ago

Lendy answer

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Gaurav Seth 7 years 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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Length and breadth of a paper is 33cm and 16cm respectively. It is folded about its breadth to form a cylinder. Find the volume of the cylinder.

Posted by Anagha Khedekar 7 years ago

CBSE > Class 08 > Mathematics

0 answers

ANSWER

all all formulas of ch 11

Posted by Pravleen Kaur 7 years ago

CBSE > Class 08 > Mathematics

0 answers

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The first cotton mill established in which year and where?

Posted by Abhishek Panda 7 years ago

CBSE > Class 08 > Social Science

1 answers

Tanaji Jadhav 7 years ago

First mill was established in Mumbai in 1854

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What was duttada secret ambition

Posted by Sangita Agarwal 7 years ago

CBSE > Class 08 > English

2 answers

Arpan Tiru 7 years ago

Duttada's secret ambition was to discover a comet

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Abhishek Panda 7 years ago

Duttada secret ambition was to discover a new comet one day.

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What are the chemical effect of electric current

Posted by Deepa Dasan 7 years ago

CBSE > Class 08 > Science

2 answers

Isha Singh 7 years ago

The passage through the liquid causes heating just as it does in solid .more importantly chemical activity may be see...

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Richa Shree 7 years ago

When a solution starts to conduct electricity or causes changes in it after passing of electricity is chemical effect of current.

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3/7+(-6/11)+(-8/21)

Posted by Annu Kumari 7 years ago

CBSE > Class 08 > Mathematics

0 answers

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A milkman sold two cows for rupees 20000 each .On one he got a profit of 5% and on other he got 10% loss find his overall profit or loss%

Posted by Jatin Ajmera 7 years ago

CBSE > Class 08 > Mathematics

2 answers

Ashish Dwivedi 7 years ago

First case SP is 20000 gain =5 percent find cp 100+5percent /100 ×20000 on other case sp same loss 10 percent find cp for 100 minus loss percent /100 × 10000 then add both cp and both sp and then find

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Ashish Dwivedi 7 years ago

It's very long so I gave you hint

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What is the difference between food and fodder crops

Posted by ᴍᴜɴɪʀᴀᴛʜɪɴᴀᴍ ᴋᴀɴɴᴀɴ 7 years ago

CBSE > Class 08 > Social Science