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Ashish Yadav 7 years, 5 months ago

Dry ice, sometimes referred to as "cardice" is the solid form of carbon dioxide. It is used primarily as a cooling agent. It's advantages include lower temperature than that of water

ANSWER

Why solid co2 called dry ice ?

Posted by Ashish Raj 7 years, 5 months ago

CBSE > Class 09 > Science

1 answers

Ashish Yadav 7 years, 5 months ago

Bro I had answered the same question posted upon.. Both answers are connected to each other

ANSWER

How atom found and what is ions who found ions

Posted by Shubham Singh 7 years, 5 months ago

CBSE > Class 09 > Science

1 answers

Nishu Kumari 7 years, 5 months ago

Atom was found by John Dalton. He proposed his atomic theory in 1808.He did not have the help of sophisticated instruments that are available today to the scientists. Positive or negative charged atoms called ions

ANSWER

What is disease, example and types

Posted by Soyam Agrawal 7 years, 5 months ago

CBSE > Class 09 > Science

0 answers

ANSWER

Who discovered first electron microscope?

Posted by Avishek Vishwakarma 7 years, 5 months ago

CBSE > Class 09 > Science

2 answers

Shubhansh Vaish 7 years, 5 months ago

Knoll and Ruska

Sany Roy 7 years, 5 months ago

Knoll and Ruska

4Thank You

ANSWER

What is leiburg unit?

Posted by Avishek Vishwakarma 7 years, 5 months ago

CBSE > Class 09 > Science

0 answers

ANSWER

Why nerve cell are long and branched? Explain

Posted by Sarthak Tiwari 7 years, 5 months ago

CBSE > Class 09 > Science

2 answers

Student Student 7 years, 5 months ago

Nerve cell are long and branched because they response to the stimuli by sending electric impulses to the brain

Yatharth Arya 7 years, 5 months ago

because they have to frequently respond to stimuli

ANSWER

Why are you likely to catch an infection when you are traveling by train or bus?

Posted by Chahal Chandiok 7 years, 5 months ago

CBSE > Class 09 > Science

0 answers

ANSWER

Which one determines the density and richness of biota

Posted by Hitesh Singh 7 years, 5 months ago

CBSE > Class 09 > Science

0 answers

ANSWER

Why cell is called structral and functional unit of life

Posted by Sejal Kumari 7 years, 5 months ago

CBSE > Class 09 > Science

3 answers

Koshika Pilaniwala 7 years, 5 months ago

Every organism on earth is made up of microscopic organisms called cells. So it is a basic structural and functional unit of life . Many cells form tissue and tissue form organs and organs form organ system which forms an organism so cells are called so.Hope this helped you. Thank you

Sakshi Jadhav 7 years, 5 months ago

Body of all organisms consists of one or many cells.Therefore,cell is called the structural unit of life .All processes associated with life such as respiration,digestion,excreation,etc,..are performed by cell.So,cell is also called as functional unit of life..

5Thank You

Sejal Kumari 7 years, 5 months ago

Why cell is called structral and fuctional unit of life

ANSWER

How does the force of gravitation between two objects change when the distance between them is reduced to half

Posted by Karan Rathore 7 years, 5 months ago

CBSE > Class 09 > Science

1 answers

Vibhav Upadhyay 7 years, 5 months ago

Becouse force of gravitation is inversaly proportional to the distance between the two bodies It means that when distance decreses the force increases similarly force decreses when distance increses

ANSWER

A girl running along a circular path with a uniform speed. How much work done by the girl

Posted by Anubhav Varshney 7 years, 5 months ago

CBSE > Class 09 > Science

1 answers

Yogita Ingle 7 years, 5 months ago

After 1 complete rotation ,the displacement is 0, so no work is done by the girl .
Since, work = force X displacement .
Work done is zero in the following cases :
1. If F = 0
2. If s =0
3. If F s cos 90 degrees. (If F and s are perpendicular )

ANSWER

Calculate the number of moles of 3. 2 gram of Oxygen gas

Posted by Suchismita Sahoo Suchismita Sahoo 7 years, 5 months ago

CBSE > Class 09 > Science

1 answers

Yogita Ingle 7 years, 5 months ago

1 molecule of O₂ weighs = 8 × 2 = 16g

16g of O₂contains = 1 mole

1g of O₂ contains = 1/16 mole

3.2 g of O₂ will contain = (1/16) × 3.2 = 1 × 0.2 = 0.2 moles

ANSWER

Why neutron is the heaviest particle

Posted by Kritika Mahajan 7 years, 5 months ago

CBSE > Class 09 > Science

2 answers

Yogita Ingle 7 years, 5 months ago

The three subatomic particles of an atom constitute Electron(-vely charged), proton(+vely charged) and neutron (electrically neutral). Mass of electron is the lowest where as mass of proton and neutron is almost same.

mass of neutron = 1.67493 X 10^-27 kg
mass of proton = 1.67262 X 10^-27 kg
mass of electron = 9.10939 X 10^-31 kg

So, neutron is the heaviest among the rest of the particles.

Yogita Ingle 7 years, 5 months ago

mass of neutron = 1.67493 X 10^-27 kg
mass of proton = 1.67262 X 10^-27 kg
mass of electron = 9.10939 X 10^-31 kg

So, neutron is the heaviest among the rest of the particles.

ANSWER

What are female *** hormones

Posted by Ruchit Ramani 7 years, 5 months ago

CBSE > Class 09 > Science

2 answers

Sarthak Tiwari 7 years, 5 months ago

The hormone which is in the female is female hormone E.g progestreone , estrogen are female reproductive hormone

Sanaya 7 years, 5 months ago

I don't know

ANSWER

Who is the father of j j Thomson

Posted by Kunal Kishore 7 years, 5 months ago

CBSE > Class 09 > Science

1 answers

Deepti Bhola 7 years, 5 months ago

Joseph James Thomson

4Thank You

ANSWER

What is the full form of UPICT

Posted by Kunal Kishore 7 years, 5 months ago

CBSE > Class 09 > Science

1 answers

Archana Yadav 7 years, 5 months ago

Uniform Protocols for Imaging in Clinical Trials

ANSWER

Who discover the electrons and protons

Posted by Kunal Kishore 7 years, 5 months ago

CBSE > Class 09 > Science

2 answers

Sany Roy 7 years, 5 months ago

Electron :J.J.Thomson Proton :Eugen Goldstein

Rishabh 2909 7 years, 5 months ago

Electron=j j thomsan Proton=Rutherford

ANSWER

Why AIDS is called a syndromes

Posted by Susanta Panja 7 years, 5 months ago

CBSE > Class 09 > Science

1 answers

Archana Yadav 7 years, 5 months ago

AIDS is called a syndromes because Aids is result in a collection of disease called syndrome

ANSWER

A train starting from rest attains a velocity of 72km/h in 5 minutes. Assuming that the acceleration is uniform, find (a) the acceleration (b) the distance traveled by the train for attaining this velocity.

Posted by Balwant Singh Bangari 7 years, 5 months ago

CBSE > Class 09 > Science

2 answers

Neel Shah 7 years, 5 months ago

u=0m/s v=72 km/h or 20 m/s t=5 min or 300 seconds (a) a= v-u/t a=20-0/300 a=1/15m/s (b)s=ut +1/2 at^2 s= 0*300 + 1/2*1/15*300*300 s=0 + 3000 s= 3000m or 3 km.

Neel Shah 5 years, 11 months ago

u=0m/s v=72km/h or 20m/s t=5 min or 300 seconds (a) a=v-u/t a=20-0/300 a=1/15 m/s (b)s=ut +1/2 at^2 s=0*300 +1/2*1/15*300 s=0+10 s=10 meter.

6Thank You

ANSWER

What is the difference between Annelida and Nematoda?

Posted by Utkarsh Tiwari 4 years, 9 months ago

CBSE > Class 09 > Science

1 answers

Sia ? 4 years, 9 months ago

ANSWER

Why do we see water droplets collected on the outer surface of a glass containing ice ?

Posted by Patra Subham 7 years, 5 months ago

CBSE > Class 09 > Science

4 answers

Koshika Pilaniwala 7 years, 5 months ago

Because the surface of glass is cool the surrounding air when comes in contact with the outer surface of the glass condenses and we can see the droplet of water.

Jithin Biju 7 years, 5 months ago

Because the water vapour around the container get condensed and stick to the container

Sony Kashyap 7 years, 5 months ago

Bcz of latent heat of vapourisation

Patra Subham 7 years, 5 months ago

Hiiii