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

A spherical mirror is that mirror whose reflecting surface is a part of a hollow sphere of glass.two types of spherical mirror are concave and convex mirror

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Sandli Thakur 5 years, 8 months ago

Spherical mirrors are those mirrors whose reflecting surface are curved. For eg. Concave and convex mirrors

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Why did mendel choose pea plants for conducting his experiment on inheritance?

Posted by Lucifer? Morningstar ? 5 years, 8 months ago

CBSE > Class 10 > Science

1 answers

Neha Bhagat 5 years, 8 months ago

Because of its short life span as he could be able to study many generations and also pea plants can be crossed easily the second important reason is that it has wide range of contrasting characters.

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What is regular reflection

Posted by Bhavesh Kumar Bhashkar 5 years, 8 months ago

CBSE > Class 10 > Science

2 answers

Sandli Thakur 5 years, 8 months ago

Regular reflection occurs when a parallel beam of light is reflected parallel to each other from a smooth surface.

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Lucifer? Morningstar ? 5 years, 8 months ago

The reflection in which parallel beam of light bounce back after reflection on smooth plane Mirror

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In a human,how many chromosomes are present in: (a) a brain cell? (b) a sperm in the testes? ( c) an egg which just been produced by the ovary? (d) a skin cell? (e) a fertilised egg?

Posted by Lucifer? Morningstar ? 5 years, 8 months ago

CBSE > Class 10 > Science

1 answers

Meena Pradhan 5 years, 8 months ago

46 chromosome are in brain cell,skin cells and fertiliser eggs.23 chromosome are in sperm and egg

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All diagrams of life processes

Posted by Jagdish Meghwal 5 years, 8 months ago

CBSE > Class 10 > Science

2 answers

Jagdish Meghwal 5 years, 8 months ago

All diagrams

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Jagdish Meghwal 5 years, 8 months ago

Givr

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Why do we need to manage the resources?

Posted by Lucifer? Morningstar ? 5 years, 8 months ago

CBSE > Class 10 > Science

9 answers

Lucifer? Morningstar ? 5 years, 8 months ago

Anu ke baad koi letter h??

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Secret Girl ???? 5 years, 8 months ago

Try karo

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Secret Girl ???? 5 years, 8 months ago

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Arjun Kashyap 5 years, 8 months ago

Anju/janu

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Secret Girl ???? 5 years, 8 months ago

Anu sahi h par ek letter missing h

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Arjun Kashyap 5 years, 8 months ago

Yes

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Secret Girl ???? 5 years, 8 months ago

Nhi bata rahi hint du

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Arjun Kashyap 5 years, 8 months ago

बिल्कुल सही उत्तर और आप जीत chuki hain apna cute nic name batane ka offer

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Secret Girl ???? 5 years, 8 months ago

For sustanaible development

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Any queries in science? Plz ask me i also clear my doubts

Posted by Arvind Yadav 5 years, 8 months ago

CBSE > Class 10 > Science

5 answers

Arvind Yadav 5 years, 8 months ago

If stomata is blocked in green plants then exchange of gases. is stop and rate of reaction of photosynthesis slow down and plant will die

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Arvind Yadav 5 years, 8 months ago

Anushka i don't understand what you want to say so plz repeat your question

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Meena Pradhan 5 years, 8 months ago

Good

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Secret Girl ???? 5 years, 8 months ago

Gas will not exchange

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Meena Pradhan 5 years, 8 months ago

Of all stomata are blocked in green plants,than what will happen

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Why magnesium ribbon should be cleaned before burning it in air?

Posted by Arvind Yadav 5 years, 8 months ago

CBSE > Class 10 > Science

3 answers

Sayak Kundu 5 years, 8 months ago

This is done to remove the protective layer of magnesium oxide from the surface of magnesium ribbon so that it may readily combine with the oxygen of air on heating.

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Arvind Yadav 5 years, 8 months ago

Meena Pradhan superb??????

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Meena Pradhan 5 years, 8 months ago

Magnesium ribbon is cleaned before burning to remove the protective layer of basic magnesium carbonate from the surface of magnesium ribbon

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What happened when egg is not fertilised in human body?

Posted by Arvind Yadav 5 years, 8 months ago

CBSE > Class 10 > Science

3 answers

Anureet Kaur 5 years, 8 months ago

The non fertilised egg will be move out from the body during mensuration

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Arvind Yadav 5 years, 8 months ago

Meena Pradhan your answer is not clear

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Meena Pradhan 5 years, 8 months ago

If the egg does not fertile in women than she will not able to have baby

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Out of genes, dna or chromosomes which one is smallest unit ?

Posted by Arvind Yadav 5 years, 8 months ago

CBSE > Class 10 > Science

1 answers

Ashutosh Kumar Tiwari 5 years, 8 months ago

genes are the smallest

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What happened to the glucose when sufficient oxygen is not provided to the cells in the human body

Posted by Arvind Yadav 5 years, 8 months ago

CBSE > Class 10 > Science

2 answers

Arvind Yadav 5 years, 8 months ago

Ashi sharma thnx???????????

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Kap Sharma 5 years, 8 months ago

When sufficient oxygen is not provided to the cells in the human body lactic acid will be produced with energy.

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Why is the color of clear sky is blue???

Posted by Arjun Kashyap 5 years, 8 months ago

CBSE > Class 10 > Science

4 answers

Lucifer? Morningstar ? 5 years, 8 months ago

Hello

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Secret Girl ???? 5 years, 8 months ago

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Alisha Negi 5 years, 8 months ago

Due to the scattering of beam of light

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Yogita Ingle 5 years, 8 months ago

The blue color of the sky is due to the scattering of light by small particles of the atmosphere.Blue is scattered more than any other colors because it travels as shorter,small waves.This is why we see a blue sky most of the time.

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State the main feature that categorizes a given pair of organs as homologous or analogous.

Posted by Kavana T N 5 years, 8 months ago

CBSE > Class 10 > Science

1 answers

Yogita Ingle 5 years, 8 months ago

Homologous organs are defined as the organs of different animals that are having a similar structure but differ in their functions.

Example of homologous organs are the forelimbs of frog, man, and the flippers of the whale. The structure of these animals are the same but the functions are different.

The flippers are used for swimming, the forelimbs of frogs are used for jumping and propping, and the forelimbs of man are used for writing, eating, holding things, etc. Having a similar structure shows that all these animals have a common ancestor.

Analogous organs are defined as the organs of different animals that are having different structure but perform the same functions.

Example of analogous organ is the wings of insect and the wings of the bird. The structure of wings of the bird has bones covered by flesh, skin, and feathers. Whereas the wings of insect is an extension of integument. But in both the cases the wings are used for flying.

These organisms would have to adapt to the same ecological niche as other organisms. Hence, they may have evolved similar (analogous) organs.

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Explain how an antacid work?

Posted by Sakshi Kanungo 5 years, 8 months ago

CBSE > Class 10 > Science

2 answers

Manya Maurya 5 years, 8 months ago

Antacids neutralise the acid made by your stomach. They are commonly used in conditions where it is helpful to neutralise the acid made in the stomach. For example, for acid reflux which causes heartburn. Most people who take antacids do not develop any side-effects.

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Arjun Kashyap 5 years, 8 months ago

Antacid react with acid to neutralize the acid

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How can we say that fragmentation is different from multiple fission?

Posted by Arjun Kashyap 5 years, 8 months ago

CBSE > Class 10 > Science

1 answers

Yogita Ingle 5 years, 8 months ago

The main difference between fission and fragmentation is that in fission, a unicellular organism breaks up to form two daughter organisms whereas in fragmentation, a multicellular organism breaks up into various fragments and each fragment develops into a complete organism.

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Difference Between solenoid and circular loop.

Posted by Arjun Kashyap 5 years, 8 months ago

CBSE > Class 10 > Science

1 answers

Yogita Ingle 5 years, 8 months ago

A solenoid is a long coil containing a large number of close turns of insulated copper wire. Its shape is somewhat like a spiral loop of wire. It may be regarded as a circular coil with very large number of turns. So, we can consider a solenoid up of elementary circular coils.
The difference is in their lengths. Solenoid has a longer length compared to its diameter. Also, the distance between its two loops is longer. While a coil has a bigger diameter and the distance between two loops in a coil is shorter compared to its diameter. Thus, we can say that a solenoid looks like a spring at its original or slightly elongated length and a coil as the same compressed spring.

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What is definition for chloroplast and chlorophyll ?

Posted by Arkesh Ramesh 5 years, 8 months ago

CBSE > Class 10 > Science

1 answers

Arjun Kashyap 5 years, 8 months ago

The chlorophyll is a pigment which gives green colour to the plants. Chloroplast is an organelles or membrane present in the plant cell and the site of photosynthesis.

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Is it More body fat will make you more float better than a person with low body fat......if yes then why and if no then why ❓

Posted by ? ????? ?????? ? 5 years, 8 months ago

CBSE > Class 10 > Science

4 answers

? ????? ?????? ? 5 years, 8 months ago

Thanks....

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Meena Pradhan 5 years, 8 months ago

I am not really sure about this answer

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Meena Pradhan 5 years, 8 months ago

No matter what the weight is becoz of mass in the water we can easily float on water

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? ????? ?????? ? 5 years, 8 months ago

Is it ke baad true rahega

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Why some substances are biodegradable while soul are nonbiodegrable?What would happen if all the waste is biodegradable

Posted by Mr. Anurag 5 years, 8 months ago

CBSE > Class 10 > Science

1 answers

Meena Pradhan 5 years, 8 months ago

If all waste are biodegradable then it would be easy to decompose waste materials

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Why calcium is formed in the form of compounds

Posted by Gazibur Rahman 5 years, 8 months ago

CBSE > Class 10 > Science

1 answers

Arjun Kashyap 5 years, 8 months ago

Because calcium is very reactive element. it react with mineral present in environment and form compound.

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Why is pure gold not suitable for ornaments?

Posted by Gazibur Rahman 5 years, 8 months ago

CBSE > Class 10 > Science

2 answers

Yogita Ingle 5 years, 8 months ago

Pure gold is known as 24 carrot gold.

It is very soft and can be easily bent without much effort!! So, we can't use pure gold in making ornaments cause they are not hard.

To prevent this gold is alloyed with either silver or copper. This alloy is hard enough for making ornaments. Generally 22 carot gold is used in making ornaments.

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Arjun Kashyap 5 years, 8 months ago

Because 24 carat gold is very pure and it cannot be given fixed shape and it melts very fast. 24 carat gold, or pure gold is very soft and hence cannot be used for making jewellery

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Describe the function of the human respiratory system

Posted by Adi Ariyan 5 years, 8 months ago

CBSE > Class 10 > Science

1 answers

Arjun Kashyap 5 years, 8 months ago

The human respiratory system is a series of organs responsible for taking in oxygen and expelling carbon dioxide. The primary organs of the respiratory system are the lungs, which carry out this exchange of gases as we breathe.

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What are the outside raw material used by an organism

Posted by Ysr Vlogs 5 years, 8 months ago

CBSE > Class 10 > Science

1 answers

Lucifer? Morningstar ? 5 years, 8 months ago

Food like plants and other animals as a source of supplying energy and materials. Oxygen for the breakdown of food to obtain energy. Water for proper digestion of food and other functions inside the body.

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Why is urine more concentrated in summer?

Posted by Lucifer? Morningstar ? 5 years, 8 months ago

CBSE > Class 10 > Science

1 answers

Yogita Ingle 5 years, 8 months ago

"Concentrated urine" means there are more solutes and less water in the sample which indicates yellow colour. Dark yellow urine indicates concentrated urine and the excretion of waste products in a smaller quantity of water. During summer we sweat more in order to maintain our body temperature. So more water is lost from our body. If we do not drink sufficient water, then there is a greater chance of excreting yellowish urine in summer.

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What is peptides

Posted by Akshay Singh 5 years, 8 months ago

CBSE > Class 10 > Science

2 answers

Manya Maurya 5 years, 8 months ago

Hope it is correct.:)

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Manya Maurya 5 years, 8 months ago

A peptide is a short chain of amino acids. The amino acids in a peptide are connected to one another in a sequence by bonds called peptide bonds. Typically, peptides are distinguished from proteins by their shorter length, although the cut-off number of amino acids for defining a peptide and protein can be arbitrary.

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What is Hertz?

Posted by Manya Maurya 5 years, 8 months ago

CBSE > Class 10 > Science