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The lining of blood vessels is made up of a layer called the endothelium. The endothelium is a single layer of cells that lines the inner surface of blood vessels, including arteries, veins, and capillaries. It plays a crucial role in regulating blood flow, maintaining vascular tone, and preventing blood clot formation by releasing various signaling molecules and controlling the passage of substances in and out of the bloodstream.

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An object experience a net zero external unbalanced force. Is it possible for the object to be traveling with a non zero velocity? If yes, state the conditions that must be placed on the magnitude and direction of the velocity. If no, provide a reason.

Posted by Aman Rathore 2 years ago

CBSE > Class 09 > Science

1 answers

Harshpreet Kaur 2 years ago

if an object is moving at a constant velocity in a straight line and the net external unbalanced force acting on it is zero, then it will continue to move with that non-zero velocity. This is in accordance with Newton's first law of motion, which states that an object in motion (or at rest) will stay in motion (or at rest) unless acted upon by an external unbalanced force.

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A force of 5 N produces an acceleration of 8ms rest to -2 on a mass M1 and an acceleration of 24ms rest to -2on a mass m2 what acceleration would the same force provide if both the masses are tied together

Posted by Shlok Kawade 2 years ago

CBSE > Class 09 > Science

2 answers

Satyam Kumar 2 years ago

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Aditya Kumar 2 years ago

A car run

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Who coined the term atom

Posted by Radhika Tiwari 2 years ago

CBSE > Class 09 > Science

2 answers

Harshpreet Kaur 2 years ago

The term "atom" can be traced back to ancient Greece. The word "atom" is derived from the Greek word "atomos," which means "indivisible" or "uncuttable." The concept of atoms as fundamental, indivisible particles was first proposed by the ancient Greek philosopher Leucippus and his student Democritus in the 5th century BCE. They hypothesized that all matter is composed of these tiny, indivisible particles called atoms, although their understanding of atoms was quite different from our modern atomic theory.

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Anup Soni 2 years ago

Democritus

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I need chemistry chapter 1

Posted by Nikhil Kal Kal 2 years ago

CBSE > Class 09 > Science

2 answers

Keshav Kumar 2 years ago

Chapter 1 is matter in our surroundings

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Aman Yadav 2 years ago

Matter in our surroundings

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Calculate the gravitational force of attraction between a stone weighing 1 kilogram and the earth is waving 6 into 10 raise to power 24 kilogram what will be the acceleration produced in the stone second acceleration produced in the earth radius of earth equal to 6.4 into 10 raise to power 6 km and g equal to 6.67 into 11 NM square upon kg

Posted by Account Deleted 2 years ago

CBSE > Class 09 > Science

1 answers

Harshpreet Kaur 2 years ago

To calculate the gravitational force of attraction between the stone and the Earth and the accelerations produced, we can use Newton's law of universal gravitation: \[F = \frac{{G \cdot (m1 \cdot m2)}}{{r^2}}\] Where: - \(F\) is the gravitational force of attraction between the two objects. - \(G\) is the gravitational constant, which is approximately \(6.67 \times 10^{-11} \, \text{N} \cdot \text{m}^2/\text{kg}^2\). - \(m1\) is the mass of the stone, which is 1 kilogram (\(1 \, \text{kg}\)). - \(m2\) is the mass of the Earth, which is \(6 \times 10^{24} \, \text{kg}\). - \(r\) is the distance between the center of the Earth and the stone, which is the radius of the Earth plus the height at which the stone is located. First, let's convert the radius of the Earth from kilometers to meters: \[r = 6.4 \times 10^6 \, \text{km} = 6.4 \times 10^6 \times 1000 \, \text{m} = 6.4 \times 10^9 \, \text{m}\] Now, we can calculate the gravitational force of attraction between the stone and the Earth: \[F = \frac{{6.67 \times 10^{-11} \, \text{N} \cdot \text{m}^2/\text{kg}^2 \cdot (1 \, \text{kg} \cdot 6 \times 10^{24} \, \text{kg})}}{{(6.4 \times 10^9 \, \text{m})^2}}\] Calculating this expression will give us the gravitational force of attraction (\(F\)) between the stone and the Earth. The acceleration produced in the stone (\(a_{\text{stone}}\)) can be found using Newton's second law (\(F = m \cdot a\)), and the acceleration produced in the Earth (\(a_{\text{Earth}}\)) can be calculated using the same formula, considering the mass of the Earth. Let's calculate \(F\), \(a_{\text{stone}}\), and \(a_{\text{Earth}}\).

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The mass of the earth is 6×10 race 2 24 kilogram and that of the moon is 7 - 4 * 10 ^ 22 kilogram if the distance between the moon 3. 84 into 10 raise to power 5 km calculate calculate the force exerted by the Earth on the moon ( G=6•67× 10 race 2 power minus 11 NM square upon kg square)

Posted by Account Deleted 2 years ago

CBSE > Class 09 > Science

1 answers

Keshav Kumar 2 years ago

search-icon-header Search for questions & chapters search-icon-image Class 11 >>Physics >>Gravitation >>Newton's Law of Gravitation >>The mass of the earth is 6 × 10^24 kg an Question Bookmark The mass of the earth is 6×10 24 kg and that of the moon is 7.4×10 22 kg. If the distance between the earth and the moon is 3.84×10 5 km, calculate the force exerted by the earth on the moon. G=6.7×10 −11 N m 2 kg −2 Medium Updated on : 2022-09-05 Solution verified Verified by Toppr Given that, Mass of the Earth m 1 =6×10 24 kg Mass of the Moon m 2 =7.4×10 22 kg Distance between the Earth and the Moon d=3.84×10 5 km=3.84×10 8 m Gravitational Constant G=6.7×10 −11 Nm 2 /kg 2 Now, by using Newton’s law of gravitation F= r 2 Gm 1 m 2 F= (3.84×10 8 ) 2 6.7×10 −11 ×6×10 24 ×7.4×10 22 F= 14.8225×10 16 297.48×10 35 F=20.069×10 19 F=20.1×10 19 N Hence, the gravitational force of attraction is 20.1×10 19 N

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125a ^ 3 - 27b ^ 3 + 75a ^ 2 * b - 45a * b ^ 2

Posted by Harshit Kumar 2 years ago

CBSE > Class 09 > Science

1 answers

Satyam Kumar 2 years ago

125a^3-27b^3+75a^2b-45ab^2

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A solution of alcohol has be prepared a mixing 150 ml with 600 ml of water caulate the volume of percentage of the solution

Posted by Arjun J Kori Ks 2 years ago

CBSE > Class 09 > Science

2 answers

Sidra A 2 years ago

volume of alchol (solute) 150ml volume of water (solvent) 600ml volume of solution 750ml volume percentage 150/750*100 1/5*100 20%

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Aditya Kumar 2 years ago

Bbn

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The mass of the earth is 6 × 10 ²⁴ and that of the moon is 7.4 ×10²² . If the distance between the earth and the moon is 3.84 × 10 ⁵ kilometre. Calculate the force exerted by the earth on the moon. Take G = and

Posted by Shreya Agnihotri 2 years ago

CBSE > Class 09 > Science

2 answers

Parneet Sekhon 2 years ago

What is gravitation

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Kavyanjali Amrit 2 years ago

the mass ofhte earth , M = 6 × 10 24 kg the mass of the moon , m = 7.4 × 10 22 the distance between the earth and the moon, d = 3.84 × 10 5 k m = 3.84 × 10 5 × 1000 m = 3.84 × 10 8 m G = 6.7 × 10 − 11 N m 2 k g − 2 From Eq . (10.4) ,the force exerted by the earth on the moon is F = G M × m d 2 = 6.7 × 10 − 11 N m 2 k g − 2 × 6 × 10 24 k g × 7.4 × 10 22 k g ( 3.84 × 10 8 m ) 2 = 2.02 × 10 20 N. Thus the force exerted by the earth on the moon is 2.02 × 10 20 N.

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Is air a mixture?

Posted by Radha . 2 years ago

CBSE > Class 09 > Science

5 answers

Karthik Karthi 2 years ago

Yes

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Kavyanjali Amrit 2 years ago

Air is a mixture and not a compound because of the following reasons: Air can be separated into its constituents such as oxygen, nitrogen etc. by fractional distillation of liquid air. Air shows the properties of all the gases present in it.

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Kunal Sisodiya 2 years ago

Yes

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Nihal Kumar 2 years ago

Yes air is mixture of many various gases like nitrogen,oxygen, co2,and other gases.

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Palak Sharma 2 years ago

Yes air is a mixture of gases like oxygen,carbon dioxide, nitrogen,and other gases

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Distinguish between the term gravitation and gravity giving suitable example

Posted by Ansh Agnihotri 2 years ago

CBSE > Class 09 > Science

1 answers

Kavyanjali Amrit 2 years ago

Gravitation:- Gravitation is the attractive force existing between any two objects that have mass. The force of gravitation pulls objects together. Gravity:- Gravity is the gravitational force that occurs between the earth and other bodies. Gravity is the force acting to pull objects toward the earth.

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Ch 8

Posted by Vijay Pal Saini 2 years ago

CBSE > Class 09 > Science

1 answers

Garvit Varshney 2 years ago

What Ch 8

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How many types of elements together make up the xylem tissue? Name them

Posted by Archana Acchu 2 years ago

CBSE > Class 09 > Science

2 answers

Karthik Karthi 2 years ago

1)Tracheids 2)Vessels 3)Xylem parenchyma 4) Xylem fibres

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Aarushi Singh Janwaar 2 years ago

4 elements together make up the xylem tissue .... 1) Tracheids 2) Vessels 3) Xylem parenchyma 4) Xylem fibres

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What is meant by a sybtance

Posted by Afiyan Sheikh 2 years ago

CBSE > Class 09 > Science

2 answers

Account Deleted 2 years ago

If you search this thing on Google, you will understand very well.

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Jyoti Gupta 2 years ago

Define food chain

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How can we drive first law of motion from the second law of motion

Posted by Armaan Singh 2 years ago

CBSE > Class 09 > Science

1 answers

Addiya Jaiswal 2 years ago

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How does the water kept in an earthen pot become cool during summer.

Posted by Sunita Bisht 2 years ago

CBSE > Class 09 > Science

1 answers

Yaduraj Singh 2 years ago

Don't post personal information, mobile numbers and other details.
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describe all the three equation of motion using velocity time gtaph

Posted by Gaurav Tiwari 2 years ago

CBSE > Class 09 > Science

1 answers

Priyanshu Kushwaha 2 years ago

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What are the properties of matter

Posted by _Pritpal Gill_ 2 years ago

CBSE > Class 09 > Science

1 answers

Sunita Bisht 2 years ago

* Matter is made up of tiny particles. *Particles of matter are very small. *Particles of matter are continuously moving. *Particles of matter attract each other.

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What is newton's first law of motion?

Posted by Ram Chandra 2 years ago

CBSE > Class 09 > Science

5 answers

Abhijit Kumar 1 year, 11 months ago

According to the first law of motion a body is always at rest and always move until any external force applied on it

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Account Deleted 2 years ago

If an object is at rest it does not mean that it moves from its rest position like if I give an example when we are in a bus then our body is at rest but as if it is Bus start hoti he to bus me ek movement hota he jo humari rest position ko move position me change kar sakta he but humari body bhi force lagati he taki vo rest position se na hate Newton ke first law ko इनेरतीa bhi kehte

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Krishna Kumar 2 years ago

First law of motion: An aap check continuous to be in a state of rest or of uniform motion along a straight line unless acted upon by an unbalanced force

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Archana Acchu 2 years ago

"If a body is at rest, it will remain rest and a body with uniform motion will remain in uniform motion until an external unbalanced force is applied"

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T. Vishal 2 years ago

I don't know

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Why do we call epidermis as a protective tissue

Posted by Archana Acchu 2 years ago

CBSE > Class 09 > Science

3 answers

Shreya Agnihotri 2 years ago

It is semi permiable membrane also . So it doesn't allow the diseases to enter the plant body .

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Shaina Malik 2 years ago

This is a main answer your question

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Shaina Malik 2 years ago

If acts as the first line of defence against various types of diseases and infection

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What is the equation on 1st law of motion

Posted by Raj Kumar 2 years, 1 month ago

CBSE > Class 09 > Science

3 answers

Ansh Yadav 2 years ago

V =u+at

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Monika Sharma Sharma 2 years ago

V=u+at

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Raj Kumar 2 years, 1 month ago

V=u+at

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What is the role of the atmosphere in climate control

Posted by Prashant Sharma 2 years, 1 month ago

CBSE > Class 09 > Science

1 answers

Devansh K.R Gautam 2 years, 1 month ago

The earth's atmosphere protects the inhabitants by absorbing harmful solar rays and maintaining a steady temperature . It wards off many dangers of space thereby making life possible on earth .

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Revision of ch 1

Posted by Hridyanshi Rohilla 2 years, 1 month ago

CBSE > Class 09 > Science

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Who observed a living cell?

Posted by Simranpreet Kaur 2 years, 1 month ago

CBSE > Class 09 > Science

5 answers

Palak Sharma 2 years ago

Antoine von leeuwonhoek

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Monika Sharma Sharma 2 years ago

Robbert Hooke

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Khushi Yadav 2 years, 1 month ago

Antonie Von Leeuwenhoek

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Samar Yadav 2 years, 1 month ago

antonvonleuwenhock

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Aafiya Usmani 2 years, 1 month ago

Robert Hooke

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S=ut+½at² drive this equation of motion

Posted by Rishab Rajput 2 years, 1 month ago

CBSE > Class 09 > Science

1 answers

Saktheswaran T.T 2 years, 1 month ago

We know that, V avg = u+v/2 and v=u+at Vavg = u+u+at/2 and v = s/t s/t = 2u + at /2 s = t(2u + at/2) s = 2ut/2 + at^2/2 s = ut + 1/2 at^2

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What is tussue

Posted by Harshpreet Kaur 2 years, 1 month ago

CBSE > Class 09 > Science

5 answers

T. Vishal 2 years ago

A group formation of cells is known as tissue

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Prachi Yadav 2 years, 1 month ago

A group of cells which work together and which has the same structure and function

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Prem Mukherjee 2 years, 1 month ago

Tissue not tussue

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Rachita Purve 2 years, 1 month ago

A group of cell is known as tissue

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Sarwin Ajantha 2 years, 1 month ago

Group of cells

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How can you separate a mixture of salt and water? Describe the method

Posted by Harsh Gandhi 2 years, 1 month ago

CBSE > Class 09 > Science

4 answers

Shrishty Bisht 2 years ago

Crystallisation

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Prachi Yadav 2 years, 1 month ago

Evaporation

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Rachita Purve 2 years, 1 month ago

The method of separating salt from water is Distillation .

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Seema Choudhary 2 years, 1 month ago

Maybe it's possible by boiling the salt water, after boiling the salt will be in the utensil and water will evaporate, but I am not sure about it!!...

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90°

Posted by Maya Kumari 2 years, 1 month ago

CBSE > Class 09 > Science