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Find the power of a concave lens of focal length 25cm

Posted by Archana Rawat 4 years, 2 months ago

CBSE > Class 10 > Science

1 answers

Sia ? 4 years, 2 months ago

Here, P = ?
f = −25 cm
As P = 100/f, f = 100/−25
= −4 dioptre

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ANSWER

State the relationship between 1ampere and 1 coulomb

Posted by Hiten Agarwal 4 years, 2 months ago

CBSE > Class 10 > Science

2 answers

Sia ? 4 years, 2 months ago

When 1 coulomb of charge flows through any cross-section of a conductor in 1 second, the electric current flowing through it is said to be 1 ampere. That is 1 ampere = 1coulomb/1second.

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Rishabh Kothari 4 years, 2 months ago

Electric current through a conductor is said to be 1 A if 1 C of charge flows through the cross section of the conductor per unit time or 1 sec

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ANSWER

A substance under goes chemical reaction to produce simpler product ,what type of reaction is this?

Posted by Atiqur Rahman 4 years, 2 months ago

CBSE > Class 10 > Science

2 answers

Rishabh Kothari 4 years, 2 months ago

Decomposition reaction

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Nitya Pv 4 years, 2 months ago

The reaction is known as decomposition reaction

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ANSWER

Write a chemical equation when magnesium is burnt in air to give magnesium oxide ?

Posted by Atiqur Rahman 4 years, 2 months ago

CBSE > Class 10 > Science

2 answers

Rishabh Kothari 4 years, 2 months ago

2Mg+ O2--> 2MgO

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Nitya Pv 4 years, 2 months ago

2mg+o2 give rise to 2Mgo

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ANSWER

What happens when the milk is left at room temperature during summer?plz give answer

Posted by Atiqur Rahman 4 years, 2 months ago

CBSE > Class 10 > Science

3 answers

Rishabh Kothari 4 years, 2 months ago

It undergoes oxidation

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Atiqur Rahman 4 years, 2 months ago

Mulk ya milk

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Nitya Pv 4 years, 2 months ago

It undergoes oxidation It would be fermented and will be transformed into lactic acid by bacteria if we keep the mulk in room temperature

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What is the nature of the substance obtained when metals are burnt in air. How do you justify your statement

Posted by Nitya Pv 4 years, 2 months ago

CBSE > Class 10 > Science

3 answers

Nitya Pv 4 years, 2 months ago

Thanks

1Thank You

Laxmi Kumari Sharma 4 years, 2 months ago

When metals are burnt in air, metal oxide is produced And their nature can be solid or gas

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Rishabh Kothari 4 years, 2 months ago

Solid or gaseous

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ANSWER

Write short notes on STDs. With examples.

Posted by Yogasri Pannerselvam 4 years, 2 months ago

CBSE > Class 10 > Science

1 answers

Sia ? 4 years, 2 months ago

Venereal diseases which are commonly known as sexually transmitted diseases (STDs) are infectious diseases transmitted through sexual contact. It is also referred by the name reproductive tract infections (RTI). AIDS, Gonorrhea, syphilis, genital herpes and warts, chlamydiosis and hepatitis-B are few commonly known STDs. Bacteria, viruses, and parasites of different strain have contributed their shares. The majority of these diseases develop without showing any symptoms which increase the risk factors, especially in women. Risk factors include infertility, pelvic inflammatory disease (PID), abortions, ectopic pregnancies, and in worse conditions, it may even lead to cancer of the reproductive tract. Unusual discharges from genitals, genital ulcers, tumours, itching, etc. are few signs and symptoms of STDs.

Sexually transmitted diseases are the name given collectively to the diseases which spread sexually. However, every STD is not sexually transmitted; they can spread through non-sexual contact also. Non-contact modes include transfusion of contaminated blood and tissue, breastfeeding, sharing of syringes, etc. STDs like AIDS can be passed from the mother to her child during birth, or after birth through breastfeeding. Hence, proper diagnosis and treatment are necessary before its blowout. Medical field researchers have a solution for every STD, while hepatitis-B, genital herpes, and HIV infections stand out of the list. These diseases still baffle them.

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Give an example of decomposition reaction which proceeds by absorbing electric energy?

Posted by Atiqur Rahman 4 years, 2 months ago

CBSE > Class 10 > Science

2 answers

Sia ? 4 years, 2 months ago

The reaction is usually endothermic because heat is required to break the bonds present in the substance. Examples: Decomposition of ferric hydroxide: Ferric hydroxide undergoes decomposition in the presence of heat, giving ferric oxide and water molecules.

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Keshav Drolia 4 years, 2 months ago

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ANSWER

Write the chemical equation of the reaction in which the following changes have taken place with an example of each. ( i ) Change in colour ( ii ) Change in temperature ( iii ) Formation of precipitate

Posted by Suraj Kumar 4 years, 2 months ago

CBSE > Class 10 > Science

1 answers

Shanjeev Nihaal M.G. 4 years, 2 months ago

1) citric acid + potassium citrate 2) CaO+H2O------>Ca(OH)2 + heat 3) potassium chloride+ silver nitrate ---->solid agcl is pricipitate out

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ANSWER

What happened if acids react with metal?

Posted by Shreya Singh 4 years, 2 months ago

CBSE > Class 10 > Science

1 answers

Sia ? 4 years, 2 months ago

Acids react with most metals to form a salt and hydrogen gas. As discussed previously, metals that are more active than acids can undergo a single displacement reaction. For example, zinc metal reacts with hydrochloric acid, producing zinc chloride and hydrogen gas.

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ANSWER

Example 12.5 ch electricity cam anybody explain its solution in an easy way to study☺️

Posted by Bharti Rani 4 years, 2 months ago

CBSE > Class 10 > Science

1 answers

Sia ? 4 years, 2 months ago

<a href="https://mycbseguide.com/dashboard/textbook/ch/1197/t/1/q/2/m/0/s/0">https://mycbseguide.com/dashboard/textbook/ch/1197/t/1/q/2/m/0/s/0</a>

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What is sublimation energy ?

Posted by Shubham Vats 4 years, 2 months ago

CBSE > Class 10 > Science

1 answers

Shreya Singh 4 years, 2 months ago

Sublimation is the conversion between the solid and the gaseous phases of matter, with no intermediate liquid stage.

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ANSWER

What is source of covid 19

Posted by Aakanksha Gupta 4 years, 2 months ago

CBSE > Class 10 > Science

1 answers

Shreya Singh 4 years, 2 months ago

The source of covid-19 is ........

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ANSWER

Expain Structure and function of heart

Posted by Bhawna Bhalla 4 years, 2 months ago

CBSE > Class 10 > Science

0 answers

ANSWER

history chapter 1 difficult words

Posted by Samiksha Bhosale 1 year, 5 months ago

CBSE > Class 10 > Science

1 answers

Pranita Shete 4 years, 2 months ago

Of which class..

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ANSWER

Fe + cl2 =FeCl3 balanced this equation

Posted by Aysha Sah 4 years, 2 months ago

CBSE > Class 10 > Science

1 answers

Pranita Shete 4 years, 2 months ago

2Fe + 3Cl2 → 2FeCl3

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ANSWER

What is electricitu

Posted by Aham Kumar 4 years, 2 months ago

CBSE > Class 10 > Science

1 answers

Sia ? 4 years, 2 months ago

Electricity is the set of physical phenomena associated with the presence and motion of matter that has a property of electric charge. Electricity is related to magnetism, both being part of the phenomenon of electromagnetism, as described by Maxwell's equations.

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ANSWER

What is source or vector of covid 19

Posted by Aakanksha Gupta 4 years, 2 months ago

CBSE > Class 10 > Science

1 answers

Preeti Dabral 4 years, 2 months ago

First, the vector (not the virus that causes COVID-19, but a different, harmless virus) will enter a cell in our body and then use the cell's machinery to produce a harmless piece of the virus that causes COVID-19.

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ANSWER

Define biodegradable substances and nonbiodegradable substances give three examples of each

Posted by Ruchika Aggarwal 4 years, 2 months ago

CBSE > Class 10 > Science

2 answers

Nitya Pv 4 years, 2 months ago

Biodegradable Which can be broken dwon into simple substances For example kitchen waste like vegetable peels ,wood paper Non biodegradable substances Which cannot be broken down into simpler substances For example polythene bags , plastic bags , plastic bottles

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Md Aftab Alam 4 years, 2 months ago

Biodegradable substance- Those substance which is easily decompose by microbes or microorganisms in soil are called biodegradable substance. Ex- vegetables peels ,clothes, etc. Non- biodegradable substances- Those substances which are not easily decompose by microbes or microorganisms are called non biodegradable substance. Ex- plastic, etc

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A solution truns red litmus blue it's PH is likely to be

Posted by Tanu Shree 4 years, 2 months ago

CBSE > Class 10 > Science

3 answers

Pranita Shete 4 years, 2 months ago

Red litmus blue means from basic nature to acidic...that's why the present solution is acidic which has PH value between 0-6..hope uh got ur ans..?

1Thank You

Sweta Kumari 4 years, 2 months ago

Greater than 7

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Chaitanya Pimpale 4 years, 2 months ago

Acidic

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ANSWER

What is the difference between lymphs and blood

Posted by Avinash Anand 4 years, 2 months ago

CBSE > Class 10 > Science

1 answers

Sia ? 4 years, 2 months ago

Lymph	Blood
colorless fluid.	reddish colored fluid.
part of lymphatic system	part of the circulatory system
helps in the body's defense as it is a part of the immune system.	associated with circulation of O₂ and CO₂, substances like hormones, waste products etc.
contains plasma and a lesser number of WBCs and platelets.	contains plasma, RBCs, WBCs, and platelets.
Carries a low amount of O₂.	Carries a large amount of O₂.
Lymph plasma lacks proteins.	Blood plasma has proteins, calcium, and phosphorus.
Transports nutrients from tissues and cells to the blood, via lymphatic vessels.	Transports nutrients and O₂ from one organ to another.
the flow of lymph is slow.	the flow of blood in blood vessels is fast.
Clots slowly as less fibrinogen is present.	Clots quickly as high amount of fibrinogen is present.
Uni-directional movement.	movement of Blood is circular motion.

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ANSWER

What is the difference between styles and templates?

Posted by Digvijay Ware 4 years, 2 months ago

CBSE > Class 10 > Science

1 answers

Sia ? 4 years, 2 months ago

Styles keep your formatting consistent within a document. Themes keep your look and feel consistent across multiple documents. Templates allow you to re-use text, and keep your look and feel consistent across multiple documents.

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ANSWER

you have been provided with three test tube.one of them contain distilled waterand the other two contain an acidic solution and a basic solution respectively.if you are given only red litmus paper,how will you identify the contents of each test tube?

Posted by Queeen? Queen Queen 4 years, 2 months ago

CBSE > Class 10 > Science

3 answers

Avinash Anand 4 years, 2 months ago

The litmus paper will turn its colour to blue to red then the solution is acidic and opposite in the case of basic.

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Anjali Joshi 4 years, 2 months ago

When litmus turns red to blue that means it's basic solution When litmus turn blue to red it mean it is acidic solution .

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Queeen? Queen Queen 4 years, 2 months ago

Answer

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ANSWER

solutions of activity 10.7 of chapter 10 of science class 10

Posted by Sahil Singla 4 years, 2 months ago

CBSE > Class 10 > Science

2 answers

Nitya Pv 4 years, 2 months ago

Refraction of light travels from one medium to another medium When light travel one rarer another to another denser medium it will bend towards the normal ,and when light travels from denser to rarer that will bend away from normal Speed of light in rarer is maximum speed of light in denser medium is minimum

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Sahil Alam 4 years, 1 month ago

What is coordination

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Notes on plaster of paris and gypsum

Posted by Shrikant Tupkar 4 years, 2 months ago

CBSE > Class 10 > Science

4 answers

Nitya Pv 4 years, 2 months ago

On heating gypsum at 373 k it loses water molecules and become calcium sulphate hemihydrate this is called as plaster of paris Plaster of Paris is also used by the doctors for the fractured bones to make in right posting Pop - CaSo4. 1/2 H20

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Pranita Shete 4 years, 2 months ago

But unable to send..

2Thank You

Pranita Shete 4 years, 2 months ago

I have..

1Thank You

Armaan Armaan 4 years, 2 months ago

In plaster of Paris 2 molecule of water is added and in gypsum only half molecules of water is added.

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ANSWER

When both kidney fails to work what are the other option doctor advice to the patient.