The negative slope of the velocity - time curve shows the body is *

Vacuoles

In other words slope of straight line of a distance-time graph shows that object is moving with uniform velocity. ... Slope  shows the velocity of the object.

Whenever we draw a line between x - axis and y-axis it's called slope ..

The climate of any place depends on the following factors:

1) Latitude

The amount of solar energy received varies according to latitude due to the curvature of the earth. That’s why air temperature generally decreases from the equator towards the poles.

2) Altitude

The atmosphere becomes less dense and temperature decreases when we go to the higher altitude from the earth surface. This is the reason why hills are cooler during summers.

3) Pressure and wind system

The pressure and wind system of any area depends on the latitude and altitude of the place. It influences the temperature and rainfall pattern.

4) Distance from the sea

The sea exerts a moderating influence on the climate. As the distance from the sea increases, its moderating influence decreases and people experience extreme weather conditions. This condition is known as continentality i.e. very hot during summers and very cold during winters.

Neutrophils: This is the largest group of white blood cells in your body. They help fight infections. Eosinophils: These help cells combat parasite infections. Like basophils and mast cells, they play a role in allergic reactions, asthma, and fighting parasite pathogens.

Gravity is the force which causes this change in the speed of the ball.

Explanation:

Gravity has the same effect on all objects. If you drop an iron road and a feather, they will fall at the exact same speed. Due to the effect of air resistance on gravity, it might look like the iron rod falls at a greater speed. However, if they were dropped in the vacuum, they would fall at the exact same time. The gravity of an object depends on its size. To be more specific, the Gravity of an object depends on the mass of that object. It is undoubtedly the weakest known force in nature and thus plays no role in determining the internal properties of everyday matter.

There is an external force of friction between the tyres and the road and in the axles of the bicycle acting which stops the cycle.

According to Newton's first law, the only time the bicycle would stop, is if it is acted upon by an external force. This is the exact case that happens to make the bicycle to come to a stop. The external force in this case is the friction between the bicycle and the ground. The force of friction gradually reduces the moving force until it gets to zero and the bicycle stops moving.

I need this explanation along with the diagram, like if the meristematic tissues and there types explanation is given then along with that ,diagram should be there like this all those topics diagram should be there.

To change Kelvin to Celsius, subtract 273.15 from the given value. So, 398 K = (398 - 273.15) C = 124.85°C

398K-273K=125°C

398k-273k= 125°c

Gram molecular mass of glucose = 180g

mass of glucose=10×2×10^23/6.03×1023

• =5697.7

 

Brass is a mixture and not a compound because in compound the elements should be in definite proportions and the elements are chemically bonded to each other.
Whereas in brass the two elements Zn & Cu are not in definite proportions (they can mix in any ratio) & there is no chemical bonding between them.

 

Homogeneous mixture	Heterogeneous mixture
(I) Homogeneous mixtures have uniform composition throughout the mixture. (II) The whole mixture is in same phase. (III) Components are not visible to the naked eye. (IV) Components cannot be separated easily. Eg.: Sugar + Water → Sugar solution	(I) Heterogeneous mixture have composition which may vary from point to point. (II) Substances can be of two phases and layers may separate. (III) Component of mixture can be seen easily. (IV) Components can be separated easily. Eg.: Salt + Sand

Metals are the elements that conduct heat and electricity and are malleable and ductile. Examples are Iron (Fe), Aluminium (Al), Silver (Ag), Copper (Cu), Gold (Au), Platinum (Pt), Lead (Pb), Potassium (K), Sodium (Na), Calcium (Ca) and Magnesium (Mg) etc.

Metals are the elements which form positive ions by losing electrons. Thus, metals are known as Electropositive Elements.

Non-metals are the elements that do not conduct electricity and are neither malleable nor ductile.
Examples: Carbon (C), Sulphur (S), Phosphorous (P), Silicon (Si), Hydrogen (H), Oxygen (O), Nitrogen (N), Chlorine (Cl), Bromine (Br), Neon (Ne) and Argon (Ar) etc.
Non-metals are the elements which form negative ions by gaining an electron. Thus, non¬metals are also known as Electronegative Elements.

Metalloids are elements which show some properties of metals and some properties of non-metals. Examples: Silicon, boron, arsenic, antimony, germanium, tellurium, polonium

A mixture consists of two or more different kinds of particles or two or more pure substances mixed together but not chemically bound. Sugar solution is a mixture because it can be separated into its constituents by physical processes (like evaporation), andit shows properties of both sugar and water.

A mixture consists of two or more different kinds of particles or two or more pure substances mixed together but not chemically bound. Sugar solution is a mixture because

1. it can be separated into its constituents by physical processes (like evaporation), and
2. it shows properties of both sugar and water.

Compounds

Compound is a pure substance made up of two or more elements combined chemically in a definite ratio.

Characteristics:

     1.  The properties of compound differ from those of its constituents.

     2.  Compound has fixed melting point and boiling point.

     3.  Compound is a homogeneous substance.

     4.  Constituent elements can be separated by chemical process.

70%

The process by which we have to separate butter from curd is called centrifugation

By the process of centrifugation

Centrifugation

Butter is separated from curd through the process of Centrifugation.

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Subtract 270 from the given Kelvin scale

Two most widely used temperature measurement scales in the thermometer industry are the Kelvin and Celsius scale. The value of one degree on the Kelvin scale is identical to the value of one degree on the Celsius scale that is the temperature differential or change is identical on both scales.

The relation can be used to convert Celsius into Kelvin:

Celsius = (Kelvin – 273.15)

0r

Kelvin = (Celsius + 273.15)

293 -273 = 20°c

Increase

Increases

An element is a substance which cannot be split up into two or more simpler substance , by the usual chemical method ( like :- heat, light or electric energy FOR EXAMPLE:- Iron, gold, silver , sodium etc Elements are further. Grouped into the following three categories 1) metal 2) Non metal 3) metalloids

Elements – Elements constitute the simplest chemical substances in which all the atoms are exactly the same.
Although an element’s atoms have the same number of protons, they can have different numbers of neutrons and hence different masses.

• Centrosome is an organelle usually containing two cylindrical structures called centrioles.
• Both the centrioles in a centrosome lie perpendicular to each other.
• Each centriole is made up of nine evenly spaced peripheral fibrils of tubulin.
• The central part of the centriole is also proteinaceous and called the hub, which is connected with tubules of the peripheral triplets by radial spokes made of protein.
• The centrioles form the basal body of cilia or flagella, and spindle fibres that give rise to spindle apparatus during cell division in animal cells.

Centriole is an organelle, cylindrical in shape, that is composed of a protein called tubulin.
All animal cells have two centrioles. They help the cell during cell division. They work during the process of mitosis and meiosis. They could be found in some lower plants such as Chlamydomonas, although they are not present in many of the fungi, angiosperms (flowering plants) and pinophyta (conifers). They are usually present near the nucleus but are not visible when the cell is not dividing.

Plasma

• Plasma is a mixture of free electrons and ions. Plasma occurs naturally in the stars (including the sun).
• Inside the stars, the temperature is so high that the atoms break up. Some of the electrons break away from the atoms converting the rest of atoms into electrically charged particles called ions. This mixture of free electrons and ions in a star is called plasma.
• The sun and other stars glow because of the presence of plasma in them.
• Plasma can also be made on the earth by passing electricity through gases at very low pressure taking in a glass tube. The fluorescent tubes and neon sign bulbs form plasma when they are switched on.

Bose- Einstein Condensate

• In 1920 Indian physicist Satyendra Nath Bose had done some calculations for a fifth state of matter. Building on it calculations, Albert Einstein predicted a new state of matter- the Bose Einstein Condensate (BEC).
• The BEC is formed by cooling a gas of extremely low density (about one –hundred- thousandth the density of normal air) to super low temperature.

Plasma and Bose-Einstein Condensate(BEC): fourth and fifth sate of matter

Plasma and BEC (Bose-Einstein Condensate) are considered as states of matter other than solid, liquid and gas. These are known as fourth and fifth states of matter.

Plasma: It is considered as the fourth state of matter. Plasma is similar to the gas. Particles of plasma are made of free electrons and ions.

Plasma does not have a definite shape or a definite volume unless enclosed in a container.

Plasma may be defined as an electrically neutral medium of positive and negative particles.

Plasma is one of the most commonly occurring states of matter in universe. Plasma occurs naturally in the stars. All stars are made of plasma. Because of the presence of plasma stars glow. Plasma is formed because of nuclear fusion in stars. Our sun glows because of presence of plasma.

Plasma TV got its name because of presence of plasma in it. Plasma is also found in fluorescent light or neon sign. Plasma is formed when electricity is passed in a fluorescent tube or neon sign, which makes them glow.

Bose-Einstein Condensate (BEC)

It may be considered as fifth state of matter. Satyendra Nath Bose and Albert Einstein were predicted about this state of matters, that’s why it got its name as Bose-Einstein Condensate (BEC).

Plasma and BEC are has opposite characters. Plasma is a super hot and super excited atom while Condensate has super cool and super unexcited atoms.

BEC has been obtained by cooling the vapor of rubidium-87 at super low temperature by Eric Cornell and Carl Wieman on June 5 1995. After sometimes Wolfgang Ketterle also obtained BEC from sodium-23 at MIT, USA. Cornell, Wieman and Ketterle got Nobel Prize in Physics for this achievement in 2001.

When we understand a topic and when we concentrate on it .We can learn it,even it is that much hard. U can also take notes,teach it parents and friends because when we teach to others it registers in our mind.

Lignin is a component of the secondary cell walls of sclerenchyma. Two types of sclerenchyma cells exists- fibres and sclereids. Their walls consist of cellulose, hemicellulose and lignin. Sclerenchyma cells are the principal supporting cells in plant tissues that have ceased elongation.

It act as a cementing material

Stone Cells   or sclereids, plant cells with considerably thickened, stratified, lignified, sometimes suberized or cutinized walls frequently saturated with calcium salts or silica and pierced by pore canaliculi. Mature stone cells have no live contents. Stone cells solidify tissues. The commonest are short stone cells, or brachysclereids, which are arranged in groups, or concretions, in fruit pith (pear, quince, chokeberry), rhizomes (peony, anemone), roots (horseradish), and phloem (oak, beech); less commonly, they form solid layers in the pericarp of nuts and acorns and cherry and plum pits. Elongated stone cells, or mac-rosclereids, usually form a solid layer in the seed coat (bean). Solitary stone cells, or idioblasts, are usually star-shaped (as-terosclereids) and found in fir bark, yellow water lily stems, and petioles; others extend from the top to bottom pellicle of a leaf, thereby making it tougher (tea, camellia).

Sclereids are also known as stone cells are a reduced form of sclerenchyma cells. It has highly thickened, lignified cellular walls that form small bundles of durable layers of tissue in most plants.