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

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.

0Thank You

ANSWER

Law of constant proportions ?

Posted by K_Hushii 🍁 3 years, 6 months ago

CBSE > Class 09 > Science

1 answers

Anushka Yadav 3 years, 6 months ago

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

1Thank You

ANSWER

What is an ion ?

Posted by K_Hushii 🍁 3 years, 6 months ago

CBSE > Class 09 > Science

4 answers

Rishabh Sharma 3 years, 6 months ago

Positively or negatively charged particles

0Thank You

Jiya Sain 3 years, 6 months ago

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

1Thank You

Anushka Yadav 3 years, 6 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 !

2Thank You

Daksh Patel 3 years, 6 months ago

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

3Thank You

ANSWER

What is cell division ?

Posted by K_Hushii 🍁 3 years, 6 months ago

CBSE > Class 09 > Science

1 answers

Jiya Sain 3 years, 6 months ago

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

0Thank You

ANSWER

What is Potential energy.....

Posted by K_Hushii 🍁 3 years, 6 months ago

CBSE > Class 09 > Science

2 answers

Neha Kanchan 3 years, 6 months ago

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

0Thank You

Chenika Goel 3 years, 6 months ago

An energy is possessed by on its height

0Thank You

ANSWER

I need some case study of chapter 10 gravitational

Posted by Tanjila Khan 3 years, 6 months ago

CBSE > Class 09 > Science

0 answers

ANSWER

What do you mean by universal law of gravitation

Posted by Gopal Sharma 3 years, 6 months ago

CBSE > Class 09 > Science

5 answers

Chenika Goel 3 years, 6 months ago

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

0Thank You

Chenika Goel 3 years, 6 months ago

F is inversely proportional 1÷dsq

0Thank You

Chenika Goel 3 years, 6 months ago

F is directly proportional M×m

0Thank You

Tausif Alam 3 years, 6 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".

1Thank You

Sadiya Mokashi 3 years, 6 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

2Thank You

ANSWER

What is relative- density?

Posted by K_Hushii 🍁 3 years, 6 months ago

CBSE > Class 09 > Science

1 answers

Sanket .........✨ 3 years, 6 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.

1Thank You

ANSWER

what is buyoncay ?

Posted by K_Hushii 🍁 3 years, 6 months ago

CBSE > Class 09 > Science

2 answers

Sanket .........✨ 3 years, 6 months ago

Good morning bestie !

0Thank You

Sanket .........✨ 3 years, 6 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.

0Thank You

ANSWER

Give a mathematical proof of Archimedes principal

Posted by Babu Jat 3 years, 6 months ago

CBSE > Class 09 > Science

1 answers

K_Hushii 🍁 3 years, 6 months ago

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

0Thank You

ANSWER

Formula of sun, glucose

Posted by Mohd Rehan 3 years, 6 months ago

CBSE > Class 09 > Science

0 answers

ANSWER

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 🍁 3 years, 6 months ago

CBSE > Class 09 > Science

4 answers

Rishabh Sharma 3 years, 6 months ago

No because there is no displement

0Thank You

Lokesh Bawal 3 years, 6 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

1Thank You

Sanket .........✨ 3 years, 6 months ago

Oh Monday se mera bhi daily ka ho gya school !

0Thank You

Hanshika Sri 3 years, 6 months ago

No , it will be considered as zero work

1Thank You

ANSWER

Formula Unit Mass of MgSO4.7H2O

Posted by Sanskar Bhushan 3 years, 6 months ago

CBSE > Class 09 > Science

1 answers

Preeti Goswami 3 years, 6 months ago

139u

0Thank You

ANSWER

Ex 10.1 ki calculation

Posted by Chenika Goel 3 years, 6 months ago

CBSE > Class 09 > Science

0 answers

ANSWER

Atomic masa.kaysay.nekaltay hai puzzle

Posted by Sirhan Chran Charan 3 years, 7 months ago

CBSE > Class 09 > Science

1 answers

K_Hushii 🍁 3 years, 7 months ago

By adding together the no. of protons and neutrons and multiplying bu 1 amu...... bcz each proton and each neutron weigh one atomic mass unit (amu) ......

0Thank You

ANSWER

What is galileo's law ?

Posted by K_Hushii 🍁 3 years, 7 months ago

CBSE > Class 09 > Science

3 answers

Sanket .........✨ 3 years, 7 months ago

Aur kya kr rhi ho...

0Thank You

Sanket .........✨ 3 years, 7 months ago

Exam kaisa gya ?

0Thank You

Sanket .........✨ 3 years, 7 months ago

Galileo's law of free fall states that, in the absence of air resistance, all bodies fall with the same acceleration, independent of their mass.

0Thank You

ANSWER

Write short notes on vaccination and immunisation

Posted by Yatharth Yadav 3 years, 7 months ago

CBSE > Class 09 > Science

2 answers

Preeti Goswami 3 years, 6 months ago

Immunization is the process by which an individual immune system becomes strong against an disease

0Thank You

Gursahib Singh 3 years, 7 months ago

Immunization is the process by which an individual's immune system becomes fortified against an infectious agent. Vaccination is The act of introducing a vaccine into the body to produce protection from a specific disease.

2Thank You

ANSWER

What is ohm's law

Posted by K_Hushii 🍁 3 years, 7 months ago

CBSE > Class 09 > Science

2 answers

Lokesh Bawal 3 years, 6 months ago

According to Ohm's law, Current through conductor in the circuit is directly proportional to the voltage across ends of conductor.

0Thank You

Sanket .........✨ 3 years, 7 months ago

Ohm's law, description of the relationship between current, voltage, and resistance. The amount of steady current through a large number of materials is directly proportional to the potential difference, or voltage, across the materials. ... Ohm's law may be expressed mathematically as V/I = R.

0Thank You

ANSWER

Drawback of bohr model

Posted by K_Hushii 🍁 3 years, 7 months ago

CBSE > Class 09 > Science

3 answers

Hansika Aggarwal 3 years, 6 months ago

No draw backs

0Thank You

Tanveer Kaur 3 years, 6 months ago

There is no draw backs

0Thank You

Sanket .........✨ 3 years, 7 months ago

It cannot explain the spectrum of atoms other than hydrogen, for example, helium atom, which possesses only two electrons. Also, it unable to explain the splitting of spectral lines in the presence of a magnetic field (Zeeman effect) or an electric field (Stark effect).

0Thank You

ANSWER

Page 59 of 1369

myCBSEguide

myCBSEguide

Test Generator

CUET Mock Tests

Download myCBSEguide App

All Courses

Other Websites

CBSE Courses

Resources

Corporate

NCERT Solutions

CBSE Sample Papers