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

According to Newton's third law of motion, for every action, there is an equal and opposite reaction. When the man jumps from a boat, he applies force on the boat due to which boat moves backward. An equal force is exerted by the boat on the man which helps the man to jump out of the boat.

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Sαurαbh Yadav 3 days, 13 hours ago

Oh that wasnt ship it was outside space space shuttle

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Guess which sound has a higher pitch : guitar or car horn ?

Posted by Suresh Singh 4 days, 5 hours ago

CBSE > Class 09 > Science

5 answers

Suresh Singh 3 days, 5 hours ago

Guitar

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Sarthak Desale 3 days, 12 hours ago

Guitar , as it has higher frequency.

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Sonakshi Rohilla 3 days, 16 hours ago

Guitar

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Neha Sharma 4 days ago

Guitar

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Suresh Singh 4 days, 5 hours ago

Car horn

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ANSWER

Differentiate plant cell and animal cell

Posted by Shaivya Parikh 3 days, 14 hours ago

CBSE > Class 09 > Science

2 answers

Preeti Dabral 3 days, 14 hours ago

Plant Cell	Animal Cell
Cells comparatively larger in size	Cells usually small in size
Cell wall present	Cell wall absent
Plastids present	Plastids absent
Vacuole are large and generally one	Vacuales are absent, if present small in size and large in number
Dictyosmoes (Golgi apparatus) are present	Prominent Golgi apparatus are present

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Kashaf Ansari 1 day, 10 hours ago

Plant Cell Animal Cell Cells comparatively larger in size Cells usually small in size Cell wall present Cell wall absent Plastids present Plastids absent Vacuole are large and generally one Vacuales are absent, if present small in size and large in number Dictyosmoes (Golgi apparatus) are present Prominent Golgi apparatus are present

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Highest marks of molecular

Posted by Yogesh Singh 4 days, 9 hours ago

CBSE > Class 09 > Science

0 answers

ANSWER

An electric heater of 1000W is used for 2 hour a day. What is costing of using it for a month of 28 days , if one unit costs Rs. 3 .

Posted by Devansh Singhal 4 days, 8 hours ago

CBSE > Class 09 > Science

2 answers

Preeti Dabral 4 days, 8 hours ago

energy consumed by heater of 1000W for 2h in one day=1000/1000×2 =2units number of units=W×h×day/1000 energy consumed by heater in 28 day 2×28=56units cost of 1unit =RS 3 cost of 56unit=3×56=RS 168

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Jayanthi Sagu 1 day, 15 hours ago

56x3=168

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ram went to rectangular path having dimension 5× 3 cover this path in 36 seconds what will be the displacement after 100 seconds

Posted by Bhumika Chouhan 6 days, 3 hours ago

CBSE > Class 09 > Science

1 answers

Devansh Singhal 5 days, 12 hours ago

(5 x 3 ) / .77

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What would happen if the plasma membrane reptures or break down

Posted by Anushriya Pradhan 3 days, 14 hours ago

CBSE > Class 09 > Science

2 answers

Preeti Dabral 3 days, 14 hours ago

Plasma membrane is the selectively permeable membrane that surrounds the cell and allows the entry and exit of selected materials of the cell. If it ruptures, the contents of the cell will come in direct contact with the surrounding medium and not only unwanted material will be able to enter freely into the cell, but useful material will also find its way out of the cell easily. This will seriously disrupt the various metabolic activities of the cell and will result in its eminent death.

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Kashaf Ansari 1 day, 10 hours ago

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Haversian canals are present in

Posted by Aman Siddiqui 6 days, 11 hours ago

CBSE > Class 09 > Science

2 answers

Parth Rana Rana Ji 5 days, 3 hours ago

Bone

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Yash Seth 6 days, 9 hours ago

Bone

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Who invented voltaic cell?

Posted by Sachin Kumar 1 week ago

CBSE > Class 09 > Science

3 answers

Pari Rai 6 days, 18 hours ago

Alessandro volta

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Sachin Kumar 1 week ago

_*~*_

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Sachin Kumar 1 week ago

Alexandro volta

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How to find buoyant force

Posted by Aman Jain 1 week ago

CBSE > Class 09 > Science

3 answers

Aman Jain 1 week ago

Sorry Sachin but I cannot understand what you write

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Sachin Kumar 1 week ago

3a1Sr

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Aman Jain 1 week ago

Please tell me about it

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Why we are able to sip hot tea or milk faster from a saucer rather than a cup

Posted by Tawfeeq Ahmed Sheikh 1 week, 1 day ago

CBSE > Class 09 > Science

1 answers

Aman Jain 1 week ago

As it takes more area and tea from saucer can be cool from the corners

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What was the role of plastids in the potato cell ?

Posted by Suprabhat Borah 1 week ago

CBSE > Class 09 > Science

1 answers

Preeti Dabral 1 week ago

Leucoplasts are the colourless plastids that store food in the form of starch, proteins, fats, and oil. In potatoes, leucoplasts store food in the form of starch. Chloroplasts and chromoplasts give colour to the plant parts.

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Difference Between,. 2H & H ²

Posted by Siddhesh Deshpande 1 week ago

CBSE > Class 09 > Science

1 answers

Preeti Dabral 1 week ago

H₂ represents one molecule of H₂ (hydrogen gas) whereas 2H represents two separate atoms of hydrogen.

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Difference Between, 1) Compound 2) Molecule

Posted by Siddhesh Deshpande 1 week ago

CBSE > Class 09 > Science

1 answers

Preeti Dabral 1 week ago

A molecule is a group of two or more atoms held together by chemical bonds. A compound is a substance which is formed by two or more different types of elements which are united chemically in a fixed proportion.

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ANSWER

Function of aeriolar tissue

Posted by Bhavya Pandey 1 week, 1 day ago

CBSE > Class 09 > Science

1 answers

Preeti Dabral 1 week, 1 day ago

Acts as a binding tissue. Bind the skin with muscles. Bind the blood vessels and nerves with other structures of body. Helps in healing of wounds.

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Explain momentum

Posted by Anjali Yadav 1 week, 1 day ago

CBSE > Class 09 > Science

2 answers

Preeti Dabral 1 week, 1 day ago

Momentum is defined as the product of mass and velocity , i.e. Momentum = mass × velocityor P = m×v = mvFor e.g. ~ a bullet fired from a pistol , etc.......Hope h like it .. ?

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Aman Jain 1 week, 1 day ago

Momentum,p = mass,m x velocity,v

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How do biotic & abiotic factors affect crop production?

Posted by Pratyush Kumar Naik 1 week, 3 days ago

CBSE > Class 09 > Science

5 answers

Sachin Kumar 1 week ago

...

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Sakshi Raturi 1 week, 2 days ago

CBSE sample paper science

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Mrunali Salunke 1 week, 3 days ago

Biotic factors - Insects, rodents etc that feeds on crop. Abiotic factors - Unfavorable condition of humidity and temperature

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Aman Jain 1 week, 3 days ago

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Priyanshu Kumar 1 week, 3 days ago

They affect production by the major causes A biotic. It

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Describe with the help of a diagram,how compression and rarefaction are product in air near a source of sound

Posted by Subodh Bansode 1 week, 2 days ago

CBSE > Class 09 > Science

1 answers

Preeti Dabral 1 week, 2 days ago

Sound waves are propagated because of compressions and rarefactions in the particles of the medium.
The region, where particles come closer, is called compression and region where particles move farther from each other is called rarefaction.

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A loaded truck starts from rest and rolls down a hilly road with a constant acceleration. The truck travels a distance of 1 km in 60 s, What is its acceleration? Find the magnitude of net force acting on the truck if its mass in 7200 kg

Posted by Aman Jain 1 week, 4 days ago

CBSE > Class 09 > Science

2 answers

Harsh Pandey 1 week, 3 days ago

Acceleration is 10by18 meter per second square

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Harsh Pandey 1 week, 3 days ago

4500N

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Engine of a train exerts a force of 6000 N. If total mass of the train and the engine be 18000kg, and initially the train was standing on the platform, what is the magnitude of velocity attained by the train 20s after the start? Assume that there is no frictional force between the railway track and the train and motion is in a horizontal direction.

Posted by Aman Jain 1 week, 4 days ago

CBSE > Class 09 > Science

1 answers

Aman Jain 1 week, 4 days ago

Please answer me for this question

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For any substance why does the temperature remain constant during the change of state?

Posted by 💖 Vanshika Tangri💖 1 week, 4 days ago

CBSE > Class 09 > Science

2 answers

Harsh Pandey 1 week, 3 days ago

It is due to the latent heat as the heat supplied to increase the temperature of the substance is used up to transform the state of matter of the substance hence the temperature stays constant.

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💖 Vanshika Tangri💖 1 week, 4 days ago

Answer plz

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Difference between prokaryotic &Eukoryotic cells

Posted by 💖 Vanshika Tangri💖 1 week, 4 days ago

CBSE > Class 09 > Science

4 answers

💖 Vanshika Tangri💖 1 week, 4 days ago

Thx for answer

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💖 Vanshika Tangri💖 1 week, 4 days ago

Thx for answer

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Mr.Harsh Chavda 1 week, 4 days ago

Prokaryotes are always unicellular, while eukaryotes are often multi-celled organisms. Additionally, eukaryotic cells are more than 100 to 10,000 times larger than prokaryotic cells and are much more complex. The DNA in eukaryotes is stored within the nucleus, while DNA is stored in the cytoplasm of prokaryotes.

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💖 Vanshika Tangri💖 1 week, 4 days ago

Plz give answer of tge question

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What is acid,base and salt

Posted by Shivaditya Dwivedi 1 week, 5 days ago

CBSE > Class 09 > Science