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  • 2 answers

Gaurav Seth 4 years, 10 months ago

The natural fibres require raw materials from plants and animals. So they lead to cutting trees and killing of animals. Synthetic fibres are made up of chemicals and these chemicals are not available in forests. So manufacturing synthetic fibres is actually helping conservation of forests.

Yash Raut 4 years, 10 months ago

Ģjf
  • 1 answers

Dhritisman Sarma 4 years, 9 months ago

Andromeda galaxy
  • 2 answers

Gaurav Seth 4 years, 10 months ago

Cultivators are used to stir and pulverize the soil, either before planting (to aerate the soil and prepare a smooth, loose seedbed) or after the crop has begun growing to kill weeds. Unlike a harrow, which disturbs the entire surface of the soil, cultivators are designed to disturb the soil in careful patterns, sparing the crop plants but disrupting the weeds. 

Yogita Ingle 4 years, 10 months ago

Cultivators can be used instead of the hoe. Cultivators are used to stir and pulverize the soil, either before planting (to aerate the soil and prepare a smooth, loose seedbed) or after the crop has begun growing to kill weeds. Unlike a harrow, which disturbs the entire surface of the soil, cultivators are designed to disturb the soil in careful patterns, sparing the crop plants but disrupting the weeds. 

  • 4 answers

Dhritisman Sarma 4 years, 9 months ago

Newton

Khushboo Tiwari 4 years, 10 months ago

Kg / m^² = newton because force = mass × displacement

Helping Friends 4 years, 10 months ago

Newton

Gaurav Seth 4 years, 10 months ago

The SI unit of force is the newton, symbol N.

Force is the product of mass and acceleration

 ∴ Force = Mass × acceleration

The S.I unit of force is kg.m/s2 or Newton

 1 Newton =105 Dyne

  • 3 answers

Pragya Jain 4 years, 10 months ago

A vaccine contains killed or weakened microbes so that the suspension may not cause diesease. For example - If a infected person comes in the contact of a healthy person so the vaccine help it To become healthy again Vaccine can be in the type of injection, medicine,etc,

Yogita Ingle 4 years, 10 months ago

Vaccines contain dead or weakened microbes of a particular disease. When a vaccine is introduced into a healthy body, the body fights and kills them by producing suitable antibodies. These antibodies remain in the body and protect it when the microbe enters the body again.

Muskan Agarwal 4 years, 10 months ago

Njhjjhhyyuhhhhjjk
  • 0 answers
  • 3 answers

Mishthy Gupta 4 years, 9 months ago

Caused by virus

Pragya Jain 4 years, 10 months ago

Drinking of contaminating water or food or coming in the contact of infected person but it can not only cause typhoid disease but also other diseases such as common cold , cholera, tuberculosis, etc,.

Akshiii ?? 4 years, 10 months ago

Drinking of contaminated water and eating food washed with contaminated water can develop a typhoid disease
  • 1 answers

Yogita Ingle 4 years, 10 months ago

Combustible substance

non-combustible substance

A substance which burns in air and tends to produce heat and light is known as Combustible substances.

Non-combustible substances are certain substances which are not combustible in the presence of air.

Necessary ingredients – Heat, fuel and air

Will not burn on being exposed to flame.

Examples – Diesel, petrol, kerosene.

Examples – Glass, stones.

  • 2 answers

Subhalaxmi Prusty 4 years, 10 months ago

Am I right

Subhalaxmi Prusty 4 years, 10 months ago

National Council of Educational Research and Training ?
  • 2 answers

Akshiii ?? 4 years, 10 months ago

Thanks ?

Gaurav Seth 4 years, 10 months ago

the thermoplastic and thermosetting plastics.

Thermosetting

Thermoplastics

1.     Thermosetting plastic cannot be easily bent but if we force to bend, it will break.

1.     We can bend thermoplastics easily.

2.     On heating thermosetting plastics, it cannot be softened. This is the reason it cannot be reshaped once it is moulded.

2. On heating the thermoplastics, it becomes softened and can be moulded and reshaped easily.

3.     For example: - Bakelite and Melamine.

3. Polythene and PVC are some of the examples of thermoplastics.

  • 2 answers

Akshiii ?? 4 years, 10 months ago

Thankyou so much Gaurav

Gaurav Seth 4 years, 10 months ago

 Food can be poisoned by microbes. Microbes produce toxic substances and thus, poison/ spoil the food. Consuming spoiled food can make us ill. Therefore it is very important to preserve food items so that microbes cannot grow & spoil them.

Microbes just don’t attack any food item, they need a suitable environment to grow & survive. Only then, they can release toxic substances and thus spoil the food. Some factors which promote growth of microbes are moisture, warm temperature etc.

  • 3 answers

Rj Sharma 4 years, 2 months ago

Gae ke mute (urine) se bane wale sundas

Akshiii ?? 4 years, 10 months ago

Thank you very mush sis!!

Yogita Ingle 4 years, 10 months ago

Manure is the decomposed form of dead plants and animals which is applied to the soil to increase the production. It is a natural form of fertilizer and is cost-effective. The human and animal excreta is also used as manure. The livestock manure is rich in nitrogen, phosphorus, and potassium.

  • 5 answers

Mishthy Gupta 4 years, 9 months ago

Cholera is caused by bacteria

Pragya Jain 4 years, 10 months ago

Bacteria

Helping Friends 4 years, 10 months ago

Water

Satya Ganesh 4 years, 10 months ago

Water

Yogita Ingle 4 years, 10 months ago

Cholera is a bacterial infection of the intestines

  • 1 answers

Sneha Ramparia 4 years, 10 months ago

Clinical development is a three-phase process. During Phase I, small groups of people receive the trial vaccine. In Phase II, the clinical study is expanded and vaccine is given to people who have characteristics (such as age and physical health) similar to those for whom the new vaccine is intended. In Phase III, the vaccine is given to thousands of people and tested for efficacy and safety. Many vaccines undergo Phase IV formal, ongoing studies after the vaccine is approved and licensed. So IV
  • 3 answers

Anish Rajput Rajput 4 years, 10 months ago

Yes

Ananya Guddad 4 years, 10 months ago

No

Sneha Ramparia 4 years, 10 months ago

False. Aluminium reacts with water to form a thin layer of aluminium oxide on it. This thin coating of aluminium oxide on aluminium acts as a barrier and stops further reactions.
  • 2 answers

Anand Joshi 4 years, 10 months ago

Acrylic

Gaurav Seth 4 years, 10 months ago

Answer : Acrylic

Explanation :

Acrylic is a man-made fibre . Acrylic is known as artificial wool or synthetic wool because it resembles wool . Acrylic is cheaper than natural wool and can be dyed in various colour . This makes acrylic is very popular among other fabrics .

  • 1 answers

Gaurav Seth 4 years, 10 months ago

Can be Recycled : Toys , carry bags , plastic bowls , ball point pens , plastic chairs , plastic covering on electrical wires .

Cannot be Recycled : Cooker handles , electrical switches , telephone instruments .

  • 1 answers

Yogita Ingle 4 years, 10 months ago

If wheat is sown in the kharif season (from June to October), then the whole crop might get destroyed because of many factors such as lack of optimum temperature, adaptability, availability of pests, etc. Kharif season includes the rainy season, which is not favourable for the growth of wheat crop. Therefore, wheat crop should not be sown during this season.

  • 2 answers

Simarpreet Kaur Bhangu 4 years, 10 months ago

Jasbir kaur

Sneha Ramparia 4 years, 10 months ago

Mayank Uttam
  • 1 answers

Gaurav Seth 4 years, 10 months ago

Consequences of deforestation:

  • Soil erosion
  • Loss of biodiversity
  • Floods and droughts
  • Climate change due to global warming
  • Disruption of water cycle
  • 3 answers

Gaurav Seth 4 years, 10 months ago

c. An atom is defined as  the structural and functional unit of a matter. The term "atom" comes from the Greek word which means indivisible, because atoms are the smallest things in the universe and could not be divided. atoms are made up of three subatomic particles like protons, neutrons and electrons.

Gaurav Seth 4 years, 10 months ago

B. 

DNA is important due to the following reasons:

1) DNA plays a crucial role in research, and also to carry out different tasks pertaining to fields such as forensic science, genealogy, agriculture, medicine, etc. 

2) Through the assessment of DNA, the paternity of a child can be identified, which has a significant effect on the child's upbringing and his or her life.

3) DNA is essential for the life of the human cell.

4) DNA codes for all the cell proteins that make life possible. The cell transcribes DNA into RNA, which it then translates into proteins. These include the enzymes, hormones and structural proteins that each cell needs.

5) Required for reproduction.

6) Cell division is essential for an organism to grow, but, when a cell divides, it must replicate the DNA in its genome so that the two daughter cells have the same genetic information as their parent. 

Gaurav Seth 4 years, 10 months ago

a. In 1665, Robert Hooke examined a thin slice of cork and observed that it consists of many little compartments, resembling a honeycomb structure. He made this observation through a self-designed microscope. He termed these boxes as cells, which is a Latin word for ‘a little room".

 

  • 1 answers

Gaurav Seth 4 years, 10 months ago

The process in which the heavy nucleus of a radioactive atom ( such as uranium, plutonium or thorium ) splits up into smaller nuclei when bombarded with low energy neutrons, is called nuclear fission.

  • 1 answers

Manoj Pal 4 years, 10 months ago

The process by which green plants turn carbon dioxide and water into food using energy from sunlight
  • 2 answers

Aditya Sharma 4 years, 10 months ago

A bacteria named rhizobium converts atmospheric nitrogen into suitable soluble compounds so that plants can utilize it.

Sanskriti Srinivasan 4 years, 10 months ago

Tell
  • 1 answers

Niraj Silal 4 years, 10 months ago

What is the science
  • 1 answers

Sneha Ramparia 4 years, 10 months ago

iodide
  • 1 answers

Gaurav Seth 4 years, 10 months ago

We will design a circuit to see that thermoplastics are poor conductors of electricity. We need a bulb, some wires, a battery, a piece of metal, and a plastic pipe. Set up the circuit first with the metal and then with the plastic pipe (as shown in the figure).

After you switch on the current, you will observe that the bulb glows in the former case. In the latter case, the bulb does not glow. Hence, a plastic pipe (which is a thermoplastic) is shown to be a poor conductor of electricity.

  • 1 answers

Gaurav Seth 4 years, 10 months ago

(i) Plastics are bad conductors of heat. Thus, they are used in making the handles of cooking vessels, containers for microwave oven and in refrigerators.

(ii) Plastics are bad conductors of electricity and used as covering materials in electrical appliances, wires, cords etc.

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