CBSE > Class 10 > Science | CBSE Board | Homework Help

Photosynthesis is the process in which green plants make there own food with the help of carbon dioxide and water in the presence of sunlight and chlorophyll

0Thank You

Sanjana Soman 4 days, 7 hours ago

Photosynthesis is a process in which green plants take carbon dioxide and water and convert into carbohydrates in presence of sunlight and chlorophyll

0Thank You

Jashanpreet Saini 5 days, 2 hours ago

Nice

0Thank You

Rumesha And Shahid 5 days, 14 hours ago

Requirements for Photosynthesis- 1. Carbon dioxide and water 2. Presence of chlorophyll and sunlight.

1Thank You

ANSWER

Class 10notes life prosses

Posted by Mukesh Kumar Mukesh Kumar 1 week ago

CBSE > Class 10 > Science

2 answers

Jashanpreet Saini 5 days, 2 hours ago

Where?

0Thank You

Mukesh Kumar Mukesh Kumar 1 week ago

Class10life procces notes

4Thank You

ANSWER

Magnification of an image is 1/4 which formed at 5cm behind mirror. Find the type of and its focal length. corresponding ray diagram.

Posted by Adelina Camillus 1 week ago

CBSE > Class 10 > Science

0 answers

ANSWER

Why the quantity of gases collected at cathode is double the amount of gas collected and anode

Posted by Anuj Gupta 1 week ago

CBSE > Class 10 > Science

0 answers

ANSWER

What is balanced chemical equation of Pb(NO3)2 + Fe(SO4)3 =Fe(NO3)3 + PbSo4

Posted by Rachit Aglawe 1 week, 1 day ago

CBSE > Class 10 > Science

0 answers

ANSWER

Write the process of heterotrophic Nutrition

Posted by Sss Sss 1 week, 1 day ago

CBSE > Class 10 > Science

2 answers

Atul Yadav 1 day, 6 hours ago

Heterotrophic nutrition is the nutrition in which organism depends on other organism or plants to survive

0Thank You

Rohit Maurya 1 week ago

Ingestion,digestion, absorption, assimilation and defecation.

3Thank You

ANSWER

A magnisium ribbon

Posted by Gopinath .V 1 week, 1 day ago

CBSE > Class 10 > Science

0 answers

ANSWER

A concave mirror has a radius of curvature of 40 cm to find the position nature and size of the image of the image an object 20 cm High placed in 8 cm in front of mirror

Posted by Deva Deva 1 week, 2 days ago

CBSE > Class 10 > Science

1 answers

Sri Reddy 2 days, 17 hours ago

Given, R=-40cm Height of object (ho)=20cm u=-8cm Height of image(hi )=? v=? WKT f=R÷2 f=-40÷2 f = -20cm 1/f = 1/v + 1/u 1/-20 = 1/v + 1/-8 -1/20 -(-1/8)=1/v -1/20 + 1/8 = 1/v (-8+20)/(8×20)= 1/v 12/(8×20)=1/v 3/40=1/v v=40/3cm (Or) v=13.33cm m=hi/ho = -v/u hi/20=-(40/3)/-8 hi/20=5/3 hi=(5×20)/3 hi=100/3 hi = 33.33cm Therefore, the image is virtual and erect and it is 13.33cm away from the mirror and its size is 33.33cm

1Thank You

ANSWER

Assertion(A): The centre of curvature is not a part of the mirror. It lies outside its reflecting surface. Reason (R): The reflecting surface of a spherical mirror forms a part of a sphere. This sphere has a centre

Posted by Nirdosh Shakya 4 days, 22 hours ago

CBSE > Class 10 > Science

0 answers

ANSWER

What is the charge of boron

Posted by Jeffalad Syiem 1 week, 3 days ago

CBSE > Class 10 > Science

1 answers

Upendra Bapat 1 week, 2 days ago

Boron has a valency of 3. When it forms ions, the charge is 3+

1Thank You

ANSWER

Barium Chloride reacts with aluminium sulfate to give aluminium Chloride and a precipitate of Barium sulphate

Posted by Anuj Chaturvedi 1 week, 4 days ago

CBSE > Class 10 > Science

1 answers

Upendra Bapat 1 week, 2 days ago

3BaCl2 + Al2(SO4)3 > 2AlCl3 + 3BaSO4

0Thank You

ANSWER

If resistance increased than the cross section are is?

Posted by Jay Lohar 1 week, 4 days ago

CBSE > Class 10 > Science

2 answers

Rumesha And Shahid 5 days, 14 hours ago

It's simply given in formula of resistance that - R= row l/a L = length a = area This formula is representing that - R is directly proportional to length and inversely proportional to area of cross section. So , we get that if we the resistance is increased than cross section area will be decreased.

0Thank You

Upendra Bapat 1 week, 2 days ago

Resistance depends inversely on cross section area of wire. If cross section area increases, resistance decreases.

0Thank You

ANSWER

A 4.5 cm needle is placed 12 cm away from a convex mirror of focal length 15 cm. Give the location of the image and the magnification. Describe what happens as the needle is moved farther from the mirror.

Posted by Gandamalla Charan 1 week, 4 days ago

CBSE > Class 10 > Science

1 answers

Devanshi Dhaka 1 week, 4 days ago

Magnesium ribbon reacts with oxygen present in air to farm a protective and inert layer of magnesium oxide on its surface. This layer doesn't react and also prevents the ribbon from burning. Thus it have to be rubbed with sandpaper before burning so that the layer is removed😊

0Thank You

ANSWER

Why should a magnesium ribbon be clean before burning in air

Posted by Mayank Chaturvedi 1 week, 5 days ago

CBSE > Class 10 > Science

4 answers

Nirdosh Shakya 1 week, 2 days ago

Magnesium ribbon reacts with oxygen in the atmosphere to form a layer of magnesium oxide which prevents it from burning.Thus, it is necessary to clean the magnesium ribbon with sand vapour before burning it

0Thank You

Ramita Jha 1 week, 4 days ago

A magnesium ribbon be clean before burning in air. It is because to remove the layer of magnesium carbonate .

1Thank You

Piyush Kuntal 1 week, 2 days ago

This content has been hidden. One or more users have flagged this content as inappropriate. Once content is flagged, it is hidden from users and is reviewed by myCBSEguide team against our Community Guidelines. If content is found in violation, the user posting this content will be banned for 30 days from using Homework help section. Suspended users will receive error while adding question or answer. Question comments have also been disabled. Read community guidelines at https://mycbseguide.com/community-guidelines.html

Few rules to keep homework help section safe, clean and informative.

Don't post personal information, mobile numbers and other details.
Don't use this platform for chatting, social networking and making friends. This platform is meant only for asking subject specific and study related questions.
Be nice and polite and avoid rude and abusive language. Avoid inappropriate language and attention, vulgar terms and anything sexually suggestive. Avoid harassment and bullying.
Ask specific question which are clear and concise.

Remember the goal of this website is to share knowledge and learn from each other. Ask questions and help others by answering questions.

1Thank You

Poorvaja Umashankar 1 week, 5 days ago

It contains the atmospheric oxygen before cleaning, and it becomes pure after rubbing it with the sand paper .

3Thank You

ANSWER

How the nature and size of the image formed by convex lenses when object is in between optical centre and principle focus and when is in between F1 and 2F1, change if the convex lenses is replaced by a concave lenses of same focal length

Posted by Prachi Jadhav 1 week, 6 days ago

CBSE > Class 10 > Science

1 answers

Upendra Bapat 1 week, 2 days ago

For a convex lens the image would be virtual and enlarged when the object is kept between the optical centre and the principal focus. It will change to real and enlarged when the object is kept between F1 and 2F1. For a concave lens, in both the cases the image will be virtual and diminished.

0Thank You

ANSWER

Pooja's mother forgot to keep the dough in refrigerator during summer. In morning some change were observed in the kneaded dough. Are these changes physical or chemical

Posted by Deepanshu Joshi 2 weeks ago

CBSE > Class 10 > Science

1 answers

Poorvaja Umashankar 1 week, 2 days ago

Don't post personal information, mobile numbers and other details.
Don't use this platform for chatting, social networking and making friends. This platform is meant only for asking subject specific and study related questions.
Be nice and polite and avoid rude and abusive language. Avoid inappropriate language and attention, vulgar terms and anything sexually suggestive. Avoid harassment and bullying.
Ask specific question which are clear and concise.

Remember the goal of this website is to share knowledge and learn from each other. Ask questions and help others by answering questions.

0Thank You

ANSWER

How transportation in human beings occur

Posted by Aadhithya J 2 weeks ago

CBSE > Class 10 > Science

4 answers

Atul Yadav 1 day, 6 hours ago

By the help of blood

0Thank You

Nirdosh Shakya 1 week, 2 days ago

Blood I guess as it transports oxygen and CO2 in it

0Thank You

Nirdosh Shakya 1 week, 2 days ago

Blodd

0Thank You

A J 1 week, 5 days ago

Food -mouth -oeshofagus - stomach -small intestine -function of liver and pancreas take place -large intestine - eliminate out through ****

1Thank You

ANSWER

How to find the vacancy of any compound

Posted by Pritee Soni 2 weeks ago

CBSE > Class 10 > Science

2 answers

A J 1 week, 1 day ago

CaO

0Thank You

Dipti Thakur 1 week, 1 day ago

Which chemical is used for white washing

1Thank You

ANSWER

How magnesium reacts with oxygen?

Posted by Jaya Sardar 2 weeks, 1 day ago

CBSE > Class 10 > Science

3 answers

Satyam 1 week, 6 days ago

Magnesium reacts with oxygen to form magnesium oxide (MgO). This reaction is exothermic, meaning it releases a lot of heat, and produces light that can temporarily blind you.

0Thank You

Pritee Soni 2 weeks ago

When a composition reaction is carried out between magnesium and the oxygen present in air , an oxide is formed known and Magnesium Oxide. # Magnesium reacts with oxygen when heat is supplied. Hope you got your answer.......

0Thank You

Rohan Vyas 2 weeks, 1 day ago

Magnesium oxide

0Thank You

ANSWER

If m=+3 write four characteristics

Posted by Suwetha Durairaj 2 weeks, 4 days ago

CBSE > Class 10 > Science

4 answers

A J 1 week, 5 days ago

Virtual Errect Convex mirror used and Enlarge

0Thank You

Poorvaja Umashankar 1 week, 2 days ago

Don't post personal information, mobile numbers and other details.
Don't use this platform for chatting, social networking and making friends. This platform is meant only for asking subject specific and study related questions.
Be nice and polite and avoid rude and abusive language. Avoid inappropriate language and attention, vulgar terms and anything sexually suggestive. Avoid harassment and bullying.
Ask specific question which are clear and concise.

Remember the goal of this website is to share knowledge and learn from each other. Ask questions and help others by answering questions.

0Thank You

Sumit Kumar 2 weeks ago

In lens::real,inverted,enlarged

0Thank You

Sumit Kumar 2 weeks ago

In mirror Virtual Erect Bigger in size Enlarged

0Thank You

ANSWER

What is type of teeth

Posted by Sanit Malik 2 weeks, 4 days ago

CBSE > Class 10 > Science

2 answers

Anuj Chaturvedi 1 week, 4 days ago

0Thank You

Adarsh Pandey Åp 2 weeks, 1 day ago

4 type of teeth

0Thank You

ANSWER

Don't post personal information, mobile numbers and other details.
Don't use this platform for chatting, social networking and making friends. This platform is meant only for asking subject specific and study related questions.
Be nice and polite and avoid rude and abusive language. Avoid inappropriate language and attention, vulgar terms and anything sexually suggestive. Avoid harassment and bullying.
Ask specific question which are clear and concise.

Remember the goal of this website is to share knowledge and learn from each other. Ask questions and help others by answering questions.

Posted by Faizaan Shaikh 2 weeks, 2 days ago

CBSE > Class 10 > Science