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A bucket made of plastic does not rust like a bucket made of iron why

Posted by Laxmikanth Metri 5 years, 1 month ago

CBSE > Class 08 > Science

3 answers

Kt King 5 years, 1 month ago

Because plastic is non reactive .it don't react with air and water.plastics are also not corroded easily

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Lakshya Nagle 5 years, 1 month ago

Because bucket is not made up of iron

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Yogita Ingle 5 years, 1 month ago

A bucket made up of plastic do not rust because the plastic do not react with moisture present in air but on the other hand if we talk about iron it get reacts with moisture and get rusted .once it get rusted some brownish yellow layer come on the surface of iron.

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Amoeba is irregular shape or a perfect shape

Posted by Anjalika Banerjee 5 years, 1 month ago

CBSE > Class 08 > Science

5 answers

Pawan Singh Rathore 5 years, 1 month ago

Irregular

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Gadde Vamsi 5 years, 1 month ago

It is an irregular shape. And it is moved by pseudopodia (false feet).

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Vijayakumari Kumari 5 years, 1 month ago

First 1 answer

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Pratham Jain 5 years, 1 month ago

Irregular shape

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Aishwarya Jaiswal 5 years, 1 month ago

Irregular

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If a force of 12 newton is applied over an area of 12 metre square what will be the pressure produced?

Posted by Tejaswini Pandey 5 years, 1 month ago

CBSE > Class 08 > Science

1 answers

Tejaswini Pandey 5 years, 1 month ago

Pta nhi!?

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Explain distillation in metals and non metals

Posted by Akula Amarnath 5 years, 1 month ago

CBSE > Class 08 > Science

1 answers

Harh Sh 5 years, 1 month ago

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Explain the difference between thermoplastic and thermosetting plastic?Give answer in 1 day.who gave the 1st answer???

Posted by Nithya Sri N.K 5 years, 1 month ago

CBSE > Class 08 > Science

3 answers

Pawan Singh Rathore 5 years, 1 month ago

Thermoplastic can bent easily and after heating it can be mould easily into different shapes and thermosetting plastic cannot be bent easily.

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Parth Variya 5 years, 1 month ago

Thermoplastic can bent easily and after heating it can be mould easily into different shapes and thermosetting plastic cannot be bent easily.

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Anshu Bansal 5 years, 1 month ago

Thermoplastic can bent easily and after heating it can be mould easily into different shapes and thermosetting plastic cannot be bent easily

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Which of the following can be beaten into thin sheets?a)zinc , b)phosphorous, c)sulphur, d)oxygen. Answer in 1 day.who give the first answer...

Posted by Nithya Sri N.K 5 years, 1 month ago

CBSE > Class 08 > Science

4 answers

Naviya Sivakumar 5 years, 1 month ago

Zinc

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Parth Variya 5 years, 1 month ago

Zinc

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Parth Variya 5 years, 1 month ago

Zinc

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Akula Amarnath 5 years, 1 month ago

Zinc

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Chapter 4th question 7,5?

Posted by Tanishka Sharma 5 years, 1 month ago

CBSE > Class 08 > Science

1 answers

Akula Amarnath 5 years, 1 month ago

7th answer lemon cannot be stored in aluminium because lemon contains acid .acid reacts with aluminium liberating hydrogen gas Spoil pickle This is answer for 7th

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What is the meaning of daring

Posted by Rehan Ali 5 years, 1 month ago

CBSE > Class 08 > Science

4 answers

Parth Variya 5 years, 1 month ago

daring is to be bold, adventurous, and a little nervy. It's a quality possessed by people who tend to take risks.

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Nithya Sri N.K 5 years, 1 month ago

daring is to be bold, adventurous, and a little nervy. It's a quality possessed by people who tend to take risks.

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Rudra Dholakiya 5 years, 1 month ago

Bohot he sahasi

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Tanishka Sharma 5 years, 1 month ago

साहसी

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Is There Any Bacteria Made Of More Than One Cell?

Posted by Nithya Sri N.K 5 years, 1 month ago

CBSE > Class 08 > Science

2 answers

Yogita Ingle 5 years, 1 month ago

No,

Bacterial cells are fundamentally different to the cells of multicellular animals such as humans. They are far smaller, with less internal organisation and no nucleus (they have DNA but it is not packaged safely within a membrane).

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Nithya Sri N.K 5 years, 1 month ago

Give answer in one day...who give the first answer???

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What are vaccines? How does a vaccine work? Vaccines consist of dead and weakened microbes. When these are swallowed or injected into the body of a patient, the body produces antibodies to fight them. The antibodies remain in the body and protect it from any future attack of disease germs.

Posted by Krish Patel 5 years, 1 month ago

CBSE > Class 08 > Science

3 answers

Krish Patel 5 years, 1 month ago

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Krish Patel 5 years, 1 month ago

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Ved Bhatt 5 years, 1 month ago

Vaccines give you immunity to a disease without you getting sick first. They are made using killed or weakened versions of the disease-causing germ or parts of the germ (called antigens). For some vaccines, genetic engineering is used to make the antigens used in the vaccine. It’s much safer to get a vaccine than to get the disease it prevents. When you get a vaccine, your immune system responds to the vaccine the same way it would to the real germ. It: Recognizes the germ in the vaccine as being foreign. Responds by making antibodies to the germ in the vaccine, just as it would for the real germ. Remembers the germ and how to destroy it. That way, if you are ever exposed to the disease-causing germ in the future, your immune system will be able to quickly destroy it before it has a chance to make you sick. This is how you get immunity from vaccines.

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Structure / photo of cell of clss 8th

Posted by Shalu Beniwal 5 years, 1 month ago

CBSE > Class 08 > Science

0 answers

ANSWER

What are important of water for production of crops?

Posted by Aryan Sharma 5 years, 1 month ago

CBSE > Class 08 > Science

3 answers

Nithya Sri N.K 5 years, 1 month ago

Water is one of the mostimportant inputs essential for theproduction of crops. Plants need it continuously during their life and in huge quantities. It profoundly influences photosynthesis, respiration, absorption, translocation and utilization of mineral nutrients, and cell division besides some other processes.

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Krish Patel 5 years, 1 month ago

Water is used for transpiration carrier of nutrients from the soil to green plant tissues. Water forms over 90% of the plant body by green or fresh weight basis. Plants can synthesis food through photosynthesis only in the presence of water in their system. Water helps to maintain the turgidity of cell walls.

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Gaurav Seth 5 years, 1 month ago

Irrigation is artificial application of water to soil to ensure growth of agricultural crops.

Water is very important for growth of plants as it helps in germination of seeds, absorption of dissolved nutrients, photosynthesis and temperature regulation.

Irrigation is very much needed in India due to irregular distribution of rainfall. If agriculture is left dependent on rains, then it will suffer during the dry seasons of the year.

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ANSWER

Image a girl of mass 50 kg standing on pencil heels, each of area of cross section of 1cm^

Posted by Beethu Joshy 5 years, 1 month ago

CBSE > Class 08 > Science

1 answers

Gaurav Seth 5 years, 1 month ago

Mass of girl = 50 kg = 50*10 = 500 N

Area of the heels 2*1 cm2 = 2cm2

Preassure exerted by the girl= 500N/2cm2

500*100*100/2

2500000 pa

Mass of the elephant 5000kg = 5000*10N

Area of feet=4*250cm2

= 4*250/100*100

Preassure exerted by elephant= 5000*10*100*100/4*250

=500000

The girl will exert more preassure than elephant by =(2500000-500000) = 2000000

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ANSWER

What is force??

Posted by Rhea Sharma 5 years ago

CBSE > Class 08 > Science

5 answers

Nithya Sri N.K 5 years, 1 month ago

A force can cause an object with mass to change its velocity, i.e., to accelerate. Force can also be described intuitively as a push or a pull.

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Krish Patel 5 years, 1 month ago

Aristotle famously represented a force as anything that causes an object to undergo “unnatural motion”. Sir Isaac Newton was one of the first scientists to study gravity and force. Any kind of force is just a push or a pull. It can be described as a push or pull on an object.

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Shaji Menon 5 years, 1 month ago

a push of pull is called force or it arises due to interaction between two objects

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Purva Sharma 5 years, 1 month ago

In physics, a force is any interaction that, when unopposed, will change the motion of an object. A force can cause an object with mass to change its velocity, i.e., to accelerate. Force can also be described intuitively as a push or a pull. A force has both magnitude and direction, making it a vector quantity.

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Pragyan Sharma 5 years, 1 month ago

a push of pull is called force

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How to get free pdf of golden guide

Posted by Nikhil Pratap Singh 5 years, 1 month ago

CBSE > Class 08 > Science

0 answers

ANSWER

More is the speed of object more friction

Posted by Tunnu Singh 5 years, 1 month ago

CBSE > Class 08 > Science

1 answers

Krish Patel 5 years, 1 month ago

Friction- Drag Force Drag force is especially dependent on the speed of an object. As an object's speed increases, the drag force from the fluid increases exponentially. For example, when you drive at high speeds, the frictional force of air on the car increases, and fuel economy decreases

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Give me two twoexample of kharif And rabi crops

Posted by Aman Yadav 5 years, 1 month ago

CBSE > Class 08 > Science

5 answers

Sanchit Joshi 5 years, 1 month ago

Kharif_ paddy,soyabean, Rabi_Mustard gram

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Nithya Sri N.K 5 years, 1 month ago

Kharif crops:paddy,maize,soybean,groundnet,and cotten...Rabi crops:wheat,gram,pea,mustard and linseed...

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Nithya Sri N.K 5 years, 1 month ago

The kharif crops includerice, maize, sorghum, pearl millet/bajra, fingermillet/ragi (cereals), arhar (pulses), soyabean, groundnut (oilseeds),cotton etc. rabi crops include wheat, barley,oats (cereals), chickpea/gram (pulses), linseed, mustard (oilseeds) etc.

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Krish Patel 5 years, 1 month ago

The kharif crops include rice, maize, sorghum, pearl millet/bajra, finger millet/ragi (cereals), arhar (pulses), soyabean, groundnut (oilseeds), cotton etc. The rabi crops include wheat, barley, oats (cereals), chickpea/gram (pulses), linseed, mustard (oilseeds) etc.

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Priyanshu Singh Rajput 5 years, 1 month ago

Kharif crop- paddy , soyabean Rabi crop- mustard , gram

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What are loudness and pitch of a sound? What physical characteristics are they related to ?

Posted by Hemant Jha 5 years, 1 month ago

CBSE > Class 08 > Science

2 answers

Krish Patel 5 years, 1 month ago

Sound waves are changes in pressure generated by vibrating molecules. The physical characteristics of sound waves influence the three psychological features of sound: loudness, pitch, and timbre. Loudness depends on the amplitude,or height, of sound waves. The greater the amplitude, the louder the sound perceived.

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Ved Bhatt 5 years, 1 month ago

Sound waves are changes in pressure generated by vibrating molecules. The physical characteristics of sound waves influence the three psychological features of sound: loudness, pitch, and timbre. Loudness depends on the amplitude, or height, of sound waves. The greater the amplitude, the louder the sound perceived.

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Chapter 3 all defination

Posted by Anugya Dubey 5 years ago

CBSE > Class 08 > Science

1 answers

Anugya Dubey 5 years ago

Please give answer

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crop and magmatic

Posted by Anmolpreet Kaur 5 years, 1 month ago

CBSE > Class 08 > Science

1 answers

Meghna Thapar 5 years ago

The various tasks performed by a farmer to produce a good crop are called agricultural practices. The various agricultural practices which are carried out at various stages of crop production are:

Preparation of soil
Sowing
Adding manure and fertilisers
Irrigation
Removal of weeds
Harvesting
Storage of food grains.

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(From chapter combustion and flame) Explain how all the biochemical reactions are slow combustion ? Such as digestion and respiration are considered in slow combustion.

Posted by Arun Chaurasiya 5 years, 1 month ago

CBSE > Class 08 > Science

0 answers

ANSWER

What is the name of plant scn

Posted by Benny Aaron 5 years, 1 month ago

CBSE > Class 08 > Science

1 answers

Nithya Sri N.K 5 years, 1 month ago

Soybean cyst nematode Soybean cyst nematode (SCN), or Heterodera glycines, is the most destructive pathogen of soybean in North America. Soybean producers in the United States lost more than 300 million bushels to the soybean cyst nematode from 2003 to 2005. More yield is lost to SCN than any other soybean pathogen.

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Which is first fully synetic fibre??

Posted by Rhea Sharma 5 years, 1 month ago

CBSE > Class 08 > Science

4 answers

Akula Amarnath 5 years, 1 month ago

Nylon which is made of any natural raw material is made of coal,water and air it is made in 1931

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Rhea Sharma 5 years, 1 month ago

Nylon

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Vansh Raheja 5 years, 1 month ago

Nylon

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Satvik Paran 5 years, 1 month ago

Nylon.

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Name the gland in the human body that produces a hormone to control sugar levels A.adrenal B.pituitary C.thyroid D.pancreas

Posted by Shreyas Patil 5 years, 1 month ago

CBSE > Class 08 > Science

1 answers

Gaurav Seth 5 years, 1 month ago

D.pancreas

There are islet cells of Langerhans in the pancreas. The β- cells produce insulin. This hormone is responsible for the regulation of the blood sugar levels. The negative feedback mechanism is used to regulate the synthesis of insulin. When blood glucose levels rise, insulin is secreted by the pancreas. The insulin works by lowering the blood glucose by increasing its uptake in cells. It also helps by stimulating the liver to convert glucose to glycogen, in which form it can be stored. When the level of blood decreases, there is signal send to the cells of the pancreas to stop secreting insulin.

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Environmentalists reccomend an increased use of biofuels to reduce pollution.Identify a biofuel from the following list A.ethanol B.coal C.kerosene D.diesel

Posted by Shreyas Patil 5 years, 1 month ago

CBSE > Class 08 > Science

1 answers

Vansh Raheja 5 years, 1 month ago

Ethanol

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what is Reaetivity series?

Posted by Hema Kalakoti 5 years, 1 month ago

CBSE > Class 08 > Science

3 answers

Hema Kalakoti 5 years, 1 month ago

Thanks

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Nithya Sri N.K 5 years, 1 month ago

A Reactivity series is an empirical, calculated, and structurally analytical progression of a series of metals, arranged by their "reactivity" from highest to lowest.

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Yogita Ingle 5 years, 1 month ago

A reactivity series, the most reactiveelement is placed at the top and the least reactive element at the bottom. More reactive metals have a greater tendency to lose electrons and form positive ions. A reactivity series of metals could include any elements.

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What are weeds.

Posted by Pankaj Yadav 5 years, 1 month ago

CBSE > Class 08 > Science

5 answers

Vansh Raheja 5 years, 1 month ago

Unwanted plands

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Rhea Sharma 5 years, 1 month ago

Weeds are the unwanted or undesirable plants that grow naturally along with the crops.

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Adya Jha 5 years, 1 month ago

Unwanted plants

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Soham Nag 5 years, 1 month ago

Unwanted plant those grow in crop is called weeds

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Pankaj Yadav 5 years, 1 month ago

Unwanted plants are weeds.

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What do you mean by eartheninig

Posted by Nibir Mahanta 5 years, 1 month ago

CBSE > Class 08 > Science

2 answers

Nithya Sri N.K 5 years, 1 month ago

Earthing is the process of transferring the immediate discharge of electricity directly to theearth plate, by means of low resistance electrical cables or wires.

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Yogita Ingle 5 years, 1 month ago

In an electrical installation , an earthing system or grounding system connects specific parts of that installation with the Earth's conductive surface for safety and functional purposes. The point of reference is the Earth's conductive surface. Also in a high power handling electrical instruments, metal part of the cabinet is connected to earth by low resistance cables

Earthing is the process of transferring the immediate discharge of electricity directly to the earth plate, by means of low resistance electrical cables or wires. In case of a short circuit due to leakages arising from weak insulation or damage, the earthing wire safely removes excess electricity and passes it on to the ground. Safety to persons operating high power electrical systems is ensured by earthing.

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What do you mean by earthin

Posted by Nibir Mahanta 5 years, 1 month ago

CBSE > Class 08 > Science

2 answers

Nithya Sri N.K 5 years, 1 month ago

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Yogita Ingle 5 years, 1 month ago

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What is carbonate nydrate

Posted by Pratima Sharma 5 years, 1 month ago

CBSE > Class 08 > Science

1 answers

Nithya Sri N.K 5 years, 1 month ago

Carbonate Hydrate is a water insoluble Magnesium source that can easily be converted to other Magnesium compounds, such as the oxide by heating (calcination).Carbonate compounds also give off carbon dioxide when treated with dilute acids. Compound Formula: CH2MgO4

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