CBSE > Class 09 > Science | CBSE Board | Homework Help

The following steps are taken by the doctors/nurses to avoid getting sick themselves: Immunisation. Wearing gloves and masks. Taking proteinaceous food to enhance their immunity. Taking prophylactic medicines. Disposing the blood samples, sputum, etc. safely.

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What is zona pellucida

Posted by K_Hushii 🍁 2 years, 9 months ago

CBSE > Class 09 > Science

2 answers

Sanket .........✨ 2 years, 9 months ago

Good morning

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Sudhanshu Rajput 2 years, 9 months ago

Hii

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Hiiiiiiii...........

Posted by Sanket .........✨ 2 years, 9 months ago

CBSE > Class 09 > Science

3 answers

K_Hushii 🍁 2 years, 9 months ago

Tum bato tum thik ho ?

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Sanket .........✨ 2 years, 9 months ago

Kaise ho dono ?

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Janki Sain 2 years, 9 months ago

Hi?

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What is the Target organ of malaria

Posted by Harnoor Kaur 2 years, 9 months ago

CBSE > Class 09 > Science

3 answers

Avni Singla 2 years, 9 months ago

Liver

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Hansika Aggarwal 2 years, 9 months ago

Liver

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Sonal Kushwaha 2 years, 9 months ago

Hand

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Why is the workdone by earth is zero ? Although there is change in its kinetic energy ( keplers 3rd law ) and also workdone = delta KE

Posted by Anushka Yadav 2 years, 9 months ago

CBSE > Class 09 > Science

1 answers

Albi Killmattes 2 years, 9 months ago

G=m/v ²

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Aeration

Posted by B Gopika 10 2 years, 9 months ago

CBSE > Class 09 > Science

0 answers

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Why dalton atomic theory faliure

Posted by Kanak Baghel 2 years, 9 months ago

CBSE > Class 09 > Science

1 answers

Hansika Aggarwal 2 years, 9 months ago

Not failed

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An electric heater for 1500W is used for 12 hours, refrigerator for 800W is used for 6hrs, 3hrs and 4hrs respectively. Calculate the electricity cost of August if 1 unit costs Rs. 11.5

Posted by Tina L 2 years, 9 months ago

CBSE > Class 09 > Science

1 answers

Hansika Aggarwal 2 years, 9 months ago

315.1 /-

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How many atoms are present in 12g of C-12 ?

Posted by Prachi Bhoriya 2 years, 9 months ago

CBSE > Class 09 > Science

1 answers

Md Ehtesham Akhter 2 years, 9 months ago

6.022×10²³ atoms are the in 12g of C-12

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If your weight is 66N on the earth surface. What will be your weight on the moon?

Posted by Prachi Bhoriya 2 years, 9 months ago

CBSE > Class 09 > Science

5 answers

Prachi Bhoriya 2 years, 9 months ago

Thanks all ?

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Study Partner 2 years, 9 months ago

If your weight is 66N on earth than your weight will be 11 N on moon as the gravity of moon ? is 1/6 of earth ?

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Purva Tripathi 2 years, 9 months ago

Ans is 11N

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Chenika Goel 2 years, 9 months ago

Ans is 11 N

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Chenika Goel 2 years, 9 months ago

1/6×66

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What cause Japanese encephalitis? How it can be prevented

Posted by Poornima Joshi 2 years, 9 months ago

CBSE > Class 09 > Science

2 answers

Anushka Yadav 2 years, 9 months ago

Culex mosquito

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Rishabh Sharma 2 years, 9 months ago

Japanese encephalitis is also called brain fever it is cause by mosquito bite

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Why we fall ill ?

Posted by Tanveer Kaur 2 years, 9 months ago

CBSE > Class 09 > Science

5 answers

Tanveer Kaur 2 years, 9 months ago

Thank you for your views ??

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Rishabh Sharma 2 years, 9 months ago

We fall ill when pathogen enter our body but when our body immune system is weak then we fall ill

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Bhumi Ka 2 years, 9 months ago

Due to drinking dirty ? Due to stagnant ? Due to less immunity Through droplets of an infected person

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Prachi Bhoriya 2 years, 9 months ago

Due to low Immunity

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Divya Kothari 2 years, 9 months ago

Infection

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Thomson 's model of an atom

Posted by K_Hushii 🍁 2 years, 9 months ago

CBSE > Class 09 > Science

1 answers

Tanveer Kaur 2 years, 9 months ago

Thomson model of atom is discovered by Thomson. He said that the atom is like a watermelon. The red part of watermelon is positive charge and the seeds of watermelon are electron. This model is called as plum pudding Model. Thanks.

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Law of constant proportions ?

Posted by K_Hushii 🍁 2 years, 9 months ago

CBSE > Class 09 > Science

1 answers

Anushka Yadav 2 years, 9 months ago

According to Joseph proust ' In a chemical substance the elements are always present in a fixed proportion by mass" thank you!

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What is an ion ?

Posted by K_Hushii 🍁 2 years, 9 months ago

CBSE > Class 09 > Science

4 answers

Rishabh Sharma 2 years, 9 months ago

Positively or negatively charged particles

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Jiya Sain 2 years, 9 months ago

Why will a sheet of paper fall slower than one that is crumpled Into a ball ?

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Anushka Yadav 2 years, 9 months ago

An ion is something that a body attains when it losses and gain electron. It is of two type 1) cation ( positively charged) 2) anion ( negatively charged) Thankyou hope it will help !

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Daksh Patel 2 years, 9 months ago

A charged atom is known as an ion . Positively charged ion : cation ,negatively charged ion : anion

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What is cell division ?

Posted by K_Hushii 🍁 2 years, 9 months ago

CBSE > Class 09 > Science

1 answers

Jiya Sain 2 years, 9 months ago

Cell division is the process by which a parent cell divides into two or more daughter cell .

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What is Potential energy.....

Posted by K_Hushii 🍁 2 years, 9 months ago

CBSE > Class 09 > Science

2 answers

Neha Kanchan 2 years, 9 months ago

An energy possessed by a body due to its height is called potential energy

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Chenika Goel 2 years, 9 months ago

An energy is possessed by on its height

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I need some case study of chapter 10 gravitational

Posted by Tanjila Khan 2 years, 9 months ago

CBSE > Class 09 > Science

0 answers

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What do you mean by universal law of gravitation

Posted by Gopal Sharma 2 years, 9 months ago

CBSE > Class 09 > Science

5 answers

Chenika Goel 2 years, 9 months ago

And combined these terms F= GMm÷dsq Universal Law of conservation

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Chenika Goel 2 years, 9 months ago

F is inversely proportional 1÷dsq

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Chenika Goel 2 years, 9 months ago

F is directly proportional M×m

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Tausif Alam 2 years, 9 months ago

According to the Newton's universal law of gravitation "the force of attraction between two object is directly proportional to the product of their masses and inversely proportional to the square of the distance between them".

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Sadiya Mokashi 2 years, 9 months ago

Newton's universal law of gravitation states that every particle in the universel attracts every other particle with a force along a line joining them. The force is directly proportional to the product of their masses and inversely proportional to the square of the distance between them

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What is relative- density?

Posted by K_Hushii 🍁 2 years, 9 months ago

CBSE > Class 09 > Science

1 answers

Sanket .........✨ 2 years, 9 months ago

Relative density, or specific gravity, is the ratio of the density of a substance to the density of a given reference material. Specific gravity for liquids is nearly always measured with respect to water at its densest; for gases, the reference is air at room temperature.

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what is buyoncay ?

Posted by K_Hushii 🍁 2 years, 9 months ago

CBSE > Class 09 > Science

2 answers

Sanket .........✨ 2 years, 9 months ago

Good morning bestie !

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Sanket .........✨ 2 years, 9 months ago

Buyoncay is an upward force exerted by a fluid that opposes the weight of a partially or fully immersed object. In a column of fluid, pressure increases with depth as a result of the weight of the overlying fluid.

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Give a mathematical proof of Archimedes principal

Posted by Babu Jat 2 years, 9 months ago

CBSE > Class 09 > Science

1 answers

K_Hushii 🍁 2 years, 9 months ago

Ah = V, vol of the body = vol of liquid displaced

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Formula of sun, glucose

Posted by Mohd Rehan 2 years, 9 months ago

CBSE > Class 09 > Science

0 answers

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A person holds a bundle of hay over his head for 30min and gets tired. Has he done some work or not ? Justify your answer.

Posted by K_Hushii 🍁 2 years, 9 months ago

CBSE > Class 09 > Science

4 answers

Rishabh Sharma 2 years, 9 months ago

No because there is no displement

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Lokesh Bawal 2 years, 9 months ago

Since there is not horizontal movement nor vertical movement hence there is no displacement. And hence work=force*displacement Work=force*0 Work=0 Therefore No work is done

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Sanket .........✨ 2 years, 9 months ago

Oh Monday se mera bhi daily ka ho gya school !

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Hanshika Sri 2 years, 9 months ago

No , it will be considered as zero work

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Formula Unit Mass of MgSO4.7H2O

Posted by Sanskar Bhushan 2 years, 9 months ago

CBSE > Class 09 > Science