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Gaurav Seth 5 years, 6 months ago

Food chains describe the feeding relationship between the organisms of an ecosystem. The flow of energy from one species to another at various biotic levels forms a food chain. The successive levels in the food chains of a community are called as trophic levels. Various trophic levels in a food chain include producers, primary consumers, secondary consumers and tertiary consumers. *Food chain helps in studying feeding relationships between organisms. *Food chain also helps us to know how much energy we gain by consuming which food. *Food chain helps us to know energy flow from one trophic level to another trophic level.

ANSWER

What is the role of decomposers in ecosystem?

Posted by Mahi..... ♾ 5 years, 6 months ago

CBSE > Class 10 > Science

2 answers

Mahi..... ♾ 5 years, 6 months ago

Thanks ??

Gaurav Seth 5 years, 6 months ago

Various roles played by decomposers in the ecosystem are:

→ They decompose biodegradable substances into useful substances.
→ They release nutrients into soil by decomposing dead and decaying matter, thus making the soil fertile.
→ They maintain the nutrient pool by returning back the nutrients in the pool.

ANSWER

State and define S.I unit of magnetic field??

Posted by Mahi..... ♾ 5 years, 6 months ago

CBSE > Class 10 > Science

2 answers

Meghna Thapar 5 years, 6 months ago

Tesla is the unit. it is defined as a particle carrying a charge of 1 coulomb and passing through a magnetic field of strength 1 Tesla at a speed of 1 m/s perpendicular to said field and experiencing a force with a magnitude 1 newton. The unit of magnetic field is tesla. It is the SI unit of magnetic field. Magnetic field is the measure of magnetic flux (Φ) per unit area. 1tesla=1wb/m2.

Gaurav Seth 5 years, 6 months ago

ANSWER

State two properties of magnetic lines of force

Posted by Mahi..... ♾ 5 years, 6 months ago

CBSE > Class 10 > Science

3 answers

Mahi....... . 5 years, 6 months ago

Thanks to both of you ??

Meghna Thapar 5 years, 6 months ago

Magnetic lines of force have a number of important properties, which include: They seek the path of least resistance between opposite magnetic poles. In a single bar magnet as shown to the right, they attempt to form closed loops from pole to pole. They never cross one another.

The magnetic lines of force has the following properties:

1) Each line is a closed and continuous curve.

2) They originate from the north pole and terminate at the south pole.

3) They will never intersect each other.

4) They are crowded near the poles where the magnetic field is strong.

5) They affect the magnetic compass needle.

Gaurav Seth 5 years, 6 months ago

Properties of Magnetic lines of force are as follows:
(i) They flow from the south pole to the north pole within a material and north pole to south pole in air
(ii) They never cross each other
(iii) They all have the same strength
(iv) Their density decreases(mainly they spread out) when they move from an area of higher permeability to an area of lower permeability
(v) Their density decreases with increasing distance from the poles.
(vi) The expansion of lines of magnetic field accrue in lateral position and contraction in longitudinal position.

ANSWER

Can anyone say how to find the equivalent resistance of a circuit?

Posted by Suryansh Singh 5 years, 6 months ago

CBSE > Class 10 > Science

1 answers

Aryan Gupta 5 years, 6 months ago

We equivalent resistance in series like this. r=r1+R2+r3 and in parallel. 1/R=1/R1+1/R2 and so on

ANSWER

If 100000000000 proton passes through a conductor having current flows of 300ma calculate time taken

Posted by Minta Yadav 5 years, 6 months ago

CBSE > Class 10 > Science

0 answers

ANSWER

Define a base and acid in terms of proton.☺️

Posted by Ishika ? 5 years, 6 months ago

CBSE > Class 10 > Science

3 answers

R G R 5 years, 6 months ago

Are you Diya?

Ishika ? 5 years, 6 months ago

Thxn??

Lucifer?? Morningstar?? 5 years, 6 months ago

An acid is a substance that donates protons (in the Brønsted-Lowry definition) or accepts a pair of valence electrons to form a bond (in the Lewis definition). A base is a substance that can accept protons or donate a pair of valence electrons to form a bo

ANSWER

S torch bulb is rated at 3 V & 600mA. Calculate it's(a) power (b) resistance (c) energy consumed if it is lighted for 4 hours

Posted by Khushi Jain 5 years, 6 months ago

CBSE > Class 10 > Science

2 answers

Saksham Kumar 5 years, 6 months ago

voltage, V=3V current, I= 600 mA= 600/1000 A= 0.6A time, t= 4h (a) power, P= V*I= 3*0.6=1.8W (watt) (b) resistance, R= V/I= 3/0.6= 5Ω(ohms) (c) energy consumed, E= P*t= 1.8/1000kW*4h= 0.0072kWh now, 1kWh= 3600000J 0.0072kWh=0.0072*3600000J=25920J

Lucifer?? Morningstar?? 5 years, 6 months ago

(a) 1.8 volt per ampere(b) 5Ω (c) 7.2 joule

ANSWER

What are hydrated salts❓❓

Posted by Ishika ? 5 years, 6 months ago

CBSE > Class 10 > Science

5 answers

Lucifer?? Morningstar?? 5 years, 6 months ago

Which are ask in upside

Ishika ? 5 years, 6 months ago

Which question...?

Lucifer?? Morningstar?? 5 years, 6 months ago

Please answer my questions miss

Ishika ? 5 years, 6 months ago

Thanks?

Lucifer?? Morningstar?? 5 years, 6 months ago

A hydrated salt is a crystalline salt molecule that is loosely attached to a certain number of water molecules

ANSWER

Difference between mirror and lens.

Posted by Lucifer?? Morningstar?? 5 years, 6 months ago

CBSE > Class 10 > Science

3 answers

Yogita Ingle 5 years, 6 months ago

Mirror	Lens
This works on the principle of reflection	This works on the principle of refraction
These are manufactured using materials other than glass or clear plastic	These are manufactured using materials made up of glass or clear plastic
An ideal mirror reflects 100% of light	An ideal lense refracts 100% of light
The uses of mirror can be seen in houses, automobiles, solar appliances etc	The uses of lenses can be seen in astronomy and scientific industries, medical and research purposes etc.
There are two types: concave and convex	There are of six types of lenses
Plane mirrors does not have a focal point	It has two focal points for each kind of lense

Mahi..... ♾ 5 years, 6 months ago

Lens-It is transparent piece of glass,with a spherical surface,that concentrated or dispereses the rays of light falling on it

Mahi..... ♾ 5 years, 6 months ago

Mirror-A mirror is either plane or spherical. In contrast,a lens has two surfaces,at least one of which is curved inward or outward.

ANSWER

Uses of concave lens.

Posted by Lucifer?? Morningstar?? 5 years, 6 months ago

CBSE > Class 10 > Science

2 answers

Ishika ? 5 years, 6 months ago

☺️1. Concave lens are used for correcting myopia or short- sightness. ☺️2. Concave lens are used in flashlight to magnify the light produced by the bulb

Yogita Ingle 5 years, 6 months ago

Concave Lenses

Eyeglasses have one convex surface and one concave surface. Such glasses can bend the light by the right amount before it gets to the eyes.
Concave lenses also make details look clearer. So they are often used together with convex lenses in ’optical systems’ to help clear up any details that are lost due to flaws in the convex lens. For example, many high quality telescopes and binoculars use concave lenses to improve the detail of the images they provide.

ANSWER

Uses of concave mirror.

Posted by Lucifer?? Morningstar?? 5 years, 6 months ago

CBSE > Class 10 > Science

3 answers

Ishika ? 5 years, 6 months ago

✨1. A concave mirror is used as a reflector in torch bulb, head lights of motorcycle , search lights ,etc to get powerful beam of light ✨2. A concave mirror is used doctor's head mirrors to focus light on the body parts.

Yogita Ingle 5 years, 6 months ago

Convex lens is used for the following purposes
1) magnifying glass
2) objective lens of a microscope and a telescope
3) in theatre spot lights

Mahi..... ♾ 5 years, 6 months ago

(1)Dentists use concave mirrors to see large image of the face(2)it is commonly used in torchs,search -lights,and vehicles,headlight to get powerful parallel beam of light

ANSWER

Uses of bifocal lens.

Posted by Lucifer?? Morningstar?? 5 years, 6 months ago

CBSE > Class 10 > Science

2 answers

Ishika ? 5 years, 6 months ago

The use of bifocal lens is to correct the defect of both myopia and hypermetropia as the lens consists of both concave and convex lens. ?

Yogita Ingle 5 years, 6 months ago

Bifocal lenses are used in the spectacles of people suffering from presbyopia, myopia, hyperopia or/and astigmatism.

These have two distinct powers and hence serves two functions. One is distant vision and the other is closeup vision.

The lens is divided into two parts with the topmost portion serving the purpose of distant vision whereas the lower part helping the closeup vision.

ANSWER

Why the sodium is kept immersed in kerosene oil????

Posted by Mahi....... . 5 years, 6 months ago

CBSE > Class 10 > Science

4 answers

Manasvi Balakrishna 5 years, 6 months ago

Because it is highly reactive metal

Jay Surya 5 years, 6 months ago

Due to the reason that sodium and potassium are highly reactive, they are always kept immersed in kerosene for the prevention from atmospheric air contents

Mahi..... ♾ 5 years, 6 months ago

Thx ??

Gaurav Seth 5 years, 6 months ago

Sodium and Potassium are highly reactive metals and react vigorously with the oxygen, carbon dioxide and moisture present in the air such that it may even cause a fire. To prevent this explosive reaction, Sodium is kept immersed in kerosene because Sodium doesn’t react with kerosene.

ANSWER

Find the expression for calculating heat

Posted by Priya Yadav 5 years, 6 months ago

CBSE > Class 10 > Science

4 answers

Jay Surya 5 years, 6 months ago

H =(I) ^2 RT

Priya Yadav 5 years, 6 months ago

Ya, l know about that but thanks for remembering

Gaurav Seth 5 years, 6 months ago

The expression you can use is
=> H=I²Rt, where I = intensity of current and R=Resistance of the resistor and t= time taken
Heat,H=square of current x resistance of the resistor x time taken.
H,Heat is a form of energy and energy,e=Pt where P is the power and t is the time taken.
Therefore H=Pt
Since P=I²Rt
we get, H=I²Rt(P =I²Ris substituted)

Gaurav Seth 5 years, 6 months ago

Heat Produced = I² RT
where i - current, R- resistance, T- Time.

Actually, H = Power * Time

Power = i²R

ANSWER

What are the materials required for photosynthesis

Posted by Aishpreet Kaur 5 years, 6 months ago

CBSE > Class 10 > Science

2 answers

Gaurav Seth 5 years, 6 months ago

The raw materials required for the process of photosynthesis are carbon dioxide, water and solar energy.
The carbon dioxide present in the atmosphere diffuses into the leaf through stomata.
Water is obtained from the plant roots.
Solar energy is obtained from the sun which gets trapped by the chlorophyll pigment present in the leaves.

Lucifer?? Morningstar?? 5 years, 6 months ago

Sunlight, chlorophyll,Co2, minerals and water.

ANSWER

Define parallel CONNECTION and series CONNECTION ?

Posted by Priya Yadav 5 years, 6 months ago

CBSE > Class 10 > Science

3 answers

Gaurav Seth 5 years, 6 months ago

PARALLEL CONNECTION:- A parallel circuit is a closed circuit divided into two or more paths before recombining to complete the circuit. Each load connected in a separate path receives the full circuit voltage and the total circuit is equal to the sum of the individual branch currents.

SERIES CONNECTION:- A series circuit is one in which every component is in a series connection. Therefore, a series circuit has the same current at all points in the circuit. The voltage drops across each component in the circuit sum to the source voltage.

Priya Yadav 5 years, 6 months ago

Only define these two ,l do not want the difference

Yogita Ingle 5 years, 6 months ago

Series	Parallel
The same amount of current flows through all the components	The current flowing through each components combines to form the current flow through the source.
In an electrical circuit, components are arranged in a line	In an electrical circuit, components are arranged parallel with each other
When resistors are put in a circuit, the voltage across each resistor is different even though the current flow is the same through all of them.	When resistors are put in this circuit, the voltage across each of the resistors is the same. And even the polarities are the same
If one component breaks down, the whole circuit will burn out.	Other components will function even if one component breaks down, each has its own independent circuit
If Vt it total voltage then it is equal to V1+V2+V3	If Vt it total voltage then it is equal to V1=V2=V3

ANSWER

Explain the properties of caustic soda.

Posted by Ishika ? 5 years, 6 months ago

CBSE > Class 10 > Science

5 answers

Ishika ? 5 years, 6 months ago

Ok by i should leave now....

Hippie Maari 5 years, 6 months ago

If he continous i have other idea dont worry

Hippie Maari 5 years, 6 months ago

Super boy

Ishika ? 5 years, 6 months ago

Ye name thk h na...

Hippie Maari 5 years, 6 months ago

What do u say know

ANSWER

What is the colour of neutral litmus solution

Posted by Ishika ? 5 years, 6 months ago

CBSE > Class 10 > Science

5 answers

Hippie Maari 5 years, 6 months ago

I will keep some girl name

Hippie Maari 5 years, 6 months ago

And remember u keep any boy name other wise keep my name

Ishika ? 5 years, 6 months ago

I mean good

Ishika ? 5 years, 6 months ago

Ok...goog idea

Hippie Maari 5 years, 6 months ago

We will change name

ANSWER

What is an alkali

Posted by Ishika ? 5 years, 6 months ago

CBSE > Class 10 > Science

5 answers

Ishika ? 5 years, 6 months ago

What

Hippie Maari 5 years, 6 months ago

We will do the same what he asks

Hippie Maari 5 years, 6 months ago

But i have an idea

Hippie Maari 5 years, 6 months ago

I am sorry its all because of me you are a girl i can understand the pain

Lucifer?? Morningstar?? 5 years, 6 months ago

It is a type of base which is soluble in water.

ANSWER

What are the uses of caustic soda??

Posted by Ishika ? 5 years, 6 months ago

CBSE > Class 10 > Science

5 answers

Ishika ? 5 years, 6 months ago

Hippie Maari 5 years, 6 months ago

Wait come to other question i have an idea

Ishika ? 5 years, 6 months ago

What shall we do i think we should ignore him....

Ashok Yadav 5 years, 6 months ago

Both again chatting what a love??

Hippie Maari 5 years, 6 months ago

Hey he is not stoping at all

ANSWER

Till when do u guys study? At night?

Posted by Suryansh Singh 5 years, 6 months ago

CBSE > Class 10 > Science

2 answers

Manasvi Balakrishna 5 years, 6 months ago

Yes the person above said is corrrct

Lucifer?? Morningstar?? 5 years, 6 months ago

No at anytime but with whole concentration

ANSWER

Which part of the body is affected by diabetes?

Posted by Lucifer ? Morningstar? 5 years, 6 months ago

CBSE > Class 10 > Science

3 answers

Disha Macwan 5 years, 6 months ago

Pancreas

Lucifer ? Morningstar? 5 years, 6 months ago

Specially 'pancreas'

Ishika ? 5 years, 6 months ago

It may affect almost every organ system.

ANSWER

When do we celebrate 'world water day'?

Posted by Lucifer ? Morningstar? 5 years, 6 months ago

CBSE > Class 10 > Science

3 answers

Sakshi Singh 5 years, 6 months ago

22nd march

Gajavelli Swathi 5 years, 6 months ago

22nd March of every year

Pankaj Malik 5 years, 6 months ago

Monday, 22 March

ANSWER

Where is the capital of Turki?

Posted by Lucifer ? Morningstar? 5 years, 6 months ago

CBSE > Class 10 > Science

2 answers

Sakshi Singh 5 years, 6 months ago

Ankara

Ishika ? 5 years, 6 months ago

May be Ankara

ANSWER

Where is the deepest place on earth?

Posted by Lucifer ? Morningstar? 5 years, 6 months ago

CBSE > Class 10 > Science

1 answers

Ishika ? 5 years, 6 months ago

The Mariana trench

ANSWER

Difference between flagella and cilia.

Posted by Lucifer ? Morningstar? 5 years, 6 months ago

CBSE > Class 10 > Science

1 answers

Pankaj Malik 5 years, 6 months ago

Cilia are short, hair-like structure, present in large numbers in a cell, while flagella are long, hair-like complex structure and are few per cell. Cilia and flagella are hair-like appendages, extending through the surface of the living cell, they differ in their mode of beating, size, and number. Cilia and flagella are the locomotory structure, which is the extension of the plasma membrane of the cell. Besides the locomotion, they also help in other processes like respiration, excretion, circulation, etc. They also take part in capturing food. These both are found in eukaryotic cells, but in prokaryotic cells only flagella Both of these appendages are found in eukaryotic cells, but in prokaryotic cells only flagella are present. Although these appendages are not found in plants. In the following article, we will discuss the difference between these two structures.

ANSWER

What is the site of photosynthesis process in plants? Write the location of Light reaction and Dark reaction in chloroplast.

Posted by Parth Makwana 5 years, 6 months ago

CBSE > Class 10 > Science

2 answers

Ashok Yadav 5 years, 6 months ago

Hello ishika and Karthik

Yogita Ingle 5 years, 6 months ago

Chloroplasts are the sites of photosynthesis in plants and blue-green algae.
The dark reaction occurs in the stroma of the chloroplast where they utilize the NADPH and ATP products of the light reaction.
Photosynthesis begins with the light reaction which is carried out only during the day in the presence of sunlight. In plants, the light-dependent reaction takes place in the thylakoid membranes of chloroplasts.