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7051.

Should we breathe with our mouth. If not,why?

Answer» When air passes through the nasal passage, the dust particles and other impurities present in it are trapped by nasal hair and mucus so that clean air goes into the lungs. So we should not breathe through our mouth.
7052.

What is the full form of SI unit

Answer» Standard international unit
System international
System international unit
7053.

What is a atomic number and how many types of atomic number?

Answer»
7054.

Can you name the two organelles contain their own genetic material define

Answer» plastid and mitochondria
7055.

On what factor do shape and size of cell depends?

Answer» on thier function
7056.

Which bacteria is present in soil to form atmospheric nitrogen name theme

Answer» The correct spelling is rhizobium.
Rizobhium
Rizosomes
7057.

what was the 6th state of matter name

Answer» by the way it is the BEC Bose-einstein condensate.
jisne asexual likha usko tho bohoth ?
Bose Einstein condensate
You
Asexual ***
7058.

Define accelaration

Answer» The rate of change of velocity with time.
The rate of change of velocity with taken time a= v-u/t
Acceleration is a measure of the change in the velocity of an object per unit time and mathematically it is given asAcceleration = (change in velocity)/ time taken\xa0
7059.

What is the cause of change in speed?

Answer» What about accelaration????
External force in same direction is the cause of change in speed.
Change the direction of an object
7060.

What is the cause of change in velocity?

Answer» Isn\'t it accelaration??
the cause of change in velocity 1) when direction changes 2) when speed changes means change in both
External force
7061.

Which element has symbol z?

Answer» Iron(Fe)
Iron
7062.

Full from of aids

Answer» Acquire immuno disease syndrome
Acquired immune deficiency syndrome
Acquired Immune Deficiency Syndrome
7063.

Why the temperture of a substance does raise during the change of state

Answer» Because this heat energy is used in overcoming the force of attraction between the particles of matter.
7064.

What are the subunits of eukaryotic ribosomes???

Answer»
7065.

Why solid CO2 is called as dry ice?

Answer» Because of Sublimation
Solid carbon dioxide directly changes into carbon dioxide gas and does not melt to produce a liquid (like ordinary ice) hence it is called dry ice.Dry ice is used to deep freeze food and to keep ice creams cold.
7066.

What is the difference between cytoplasm and nucleus?

Answer» ?ok
cytoplasm is mainly composed of water which appear like jelly it provides region for cellular activities nucleus is called the brain of the cell and it found both animal and plant cell it contain dna which are genetic materials of almost all the organism
Cytoplasm is fluid content in cell n nuclues is an organelle that controls functions of all cell organelles
Cytoplasm is a fluid like that occur s in plasma membrane
7067.

What is the actual meaning of science ?

Answer» Thanka
Science is the systemetised knowledge gained by us through experiments & observation
Science is our surrounding or enviournment.
All the things around us is science.
7068.

table of the different types of epithelial tissue with there function and location

Answer»
7069.

What is nucleolus? And its fumction

Answer» A nucleolus is a part of nucleus which helps in formation of ribosomes
7070.

What is cell wall? Write its functions.

Answer» It is a rigid covering made up of a cellulose which is a complex substance is providing structural support to plants.Functions : It provides mechanical strength to support the cell. It is freely permeable to water and substance in solution.
Outermost coveiong of the cell. Its made up of cellulose
7071.

Chapter 8 all activities

Answer»
7072.

Characteristics of solid liquid gas through waste material

Answer» The characteristics of fresh municipal solid waste (MSW) are critical in planning, designing, operating or upgrading solid waste management systems. Physical composition, moisture content, compacted unit weight, permeability are the most important MSW characteristics to be considered in planning a system.
7073.

Discuss whether the walls of your classroom are at rest or in motion

Answer» the wall of the classroom is at rest but aspect to the earth the wall is in motin
7074.

Why is water kept in earthen fort becomes cool after sometime

Answer» basically clay is made of super tight particles. so it allows only very less water to lose out. so hence during evaporation the pores release some amount of water and thence the surrounding medium and the pot also has to be cooled. so basically this is what happens in cooling, the main agent property is evaporation. Ashish chanchlani hotha tho answer ke beech mein he mujhe maaf karna on Sai Ram tujse pehle loonga mummy daddy ka Naam??
Because of small pores
An earthen port has small pores on its surface. When water is poured into it some of it seeps through these pores on reaching there it evaporayes . As the result water cools down
Pores
An earthen pot has many tiny pores inside it through which water keeps on evaporating.During a hot day the water molecules present at the surface attain their boiling temperature and evaporate while the rest water molecules remain cool.
Becoz of evaporation ..
7075.

Write the experiment to show that matter is made up of particles

Answer» Procedure:1.Dissolve a few crystals of potassium permanganate in 100 ml of water.2.Take out approximately 10 mL of this solution and\xa0add it to 90 mL of clear water taken in another beaker.3.Now from this solution, take 10 ml of the solution and add it 90 ml of water taken in another beaker.4. In the same manner Keep diluting the solution like this 5 to 8 times.Observation:This experiment shows that just a few crystals of potassium permanganate can colour a large volume of water (about 1000 L).Conclusion:This activity proves that matter is made up of tiny particles. So we conclude that there must be millions of tiny particles in just one crystal of potassium permanganate, which keep on dividing themselves into smaller and smaller particles. Ultimately a stage is reached when the particles cannot divide further into smaller particles.
7076.

How many Watts equal 1 horsepower

Answer» 746watts
7077.

How is the cell fundamental unit of life explain

Answer» Thanks for answers
Cell is the fundamental unit of life because every single living thing is made up of cell and without cell it may not possible for our existence.
Because without cell the structure of our body can not be build.Therefore cell is the fundamental unit of life.
Because without cell we do not build structure in our body
This is because without a cell any life is Mission ImpossibleThis is also called as building blocks of life.Cells-Tissue-Organ-Organ system-Life
7078.

Why is virus considered as an exception to cell theory ??

Answer» It is non living when it is out side the host when it enters in a host it performs all functions of the living organism
Virus are non cellular organism. They do not have nucleus, cytoplasm or enzyme and do not perform any life activity. They can multiply only inside the living host by taking over their machinery.
Pta ni
7079.

Explain law of motion (all 3)

Answer» First- law of inertiaSecond -law of momentumThird -action reaction
An object
The first law of motion is stated as: An object remains in a state of rest or of uniform motion in a straight line unless compelled to change that state by an applied force.The second law of motion states that: the rate of change of momentum of an object is proportional to the applied unbalanced force in the direction of forceNewton\'s third law of motion states that: Whenever a body exerts a force on another body, the second body exerts an equal and opposite force on the first body .
7080.

Why does slope of position time graph give as

Answer» Velocity
Speed
7081.

Draw the triangular interconversion of the 3 states of matter

Answer» Interconversion of three states of matter: Any state of matter can be converted into other state with the help of temperature or pressure.
7082.

What is pryocrayotic

Answer» Prokaryotic cells are cells that do not have a true nucleus or most other cell organelles. Organisms that have prokaryotic cells are unicellular and called prokaryotes. Bacteria and archaea are prokaryotes.
7083.

Wax is heated in a china dish . How will following change during heating kinetic energy of particles

Answer»
7084.

Suggest an activity to separate napthalene and ammonium chloride with well labelled diagram

Answer»
7085.

Distinguish between boiling and evaporation from

Answer» 1. Boiling occurs at fixed temperature whereas evaporation occurs at any temperature. 2.evaporation is a surface phenomenon and boiling is bulk phenomenon 3.no cooling is observed during boiling whereas in evaporation cooling is observed
\tSr.No.EvaporationBoiling1.Evaporation is the process of conversion of liquid to vapour which occur at much slower rate.Boiling is the process of conversion of liquid to vapour which occur at much faster rate.2.It takes place at all temperature.It takes place at a fixed temperature.3.It takes place only from the surface of the liquid.It is a surface phenomenon.It takes place from all parts of the liquid. It is a bulk phenomenon.\t
7086.

Rubber band change it shape is it a solid

Answer» Yes it is solid
Yes, it changes its shape because of the force we apply to strech it .
Yes it is a solid because when we apply our force and stretch the rubber band it changes it shape but when we leave it , it regains the same shape.
If we stRetch rubber band it changes its shape because of force .yes it is solid
Rubber band has the property of elasticity due to which when we apply force on it. It change its shape but it is Still a solid because if force is removed and regain its original shape as well as it has definite shape and volume.
Yes it is solid
Yes, it is a solid. It changes its shape only when we apply force on it.
7087.

Which is the longest cell in plants

Answer» cycas
Fibre of ramie
Fibre Of ramine
Ovule of cycas is the largest cell among the multicellular plants. The unicellular marine alga Acetabularia, can reach upto 10 cm in height.
Fibre of ramie
7088.

Which cell organelle give rise to lysosomes?

Answer» GA
Golgi body /complex gives rise to lysosomes
Golgi apparatus help in the formation of lysosome
7089.

Write. the role of cell membrane ?

Answer» Cell membrane or plasma membrane is the outer layer of cell. It separates the cytoplasm and outer environment . The main function of cell membrane is to selectively control the entry and exit of substances inside and outside the cell
The cell membrane, also known as the plasma membrane, is a double layer of lipids and proteins that surrounds a cell and separates the cytoplasm (the contents of the cell) from its surrounding environment. It is selectively permeable, which means that it only lets certain molecules enter and exit.
7090.

What is centifugation

Answer» Centrifugation: Centrifugation is a process that involves the use of the centrifugal force for the sedimentation of mixtures with a centrifuge, used in industry and in laboratory settings. This process is used to separate two immiscible liquids.Under centrifugal force, the particles will begin sedimenting through the gradient in separate zones according to their size, shape and density.
7091.

Why would at aircraft be unable to fly on the moon?

Answer» Newtons third law
Because no air is present on the moon and the aircraft engine uses the principle of conservation of momentum in which normal atmospheric air is converted into hot air is emitted out from the engine and aircraft moves forward so as there is no Air on the moon aircraft can\'t flyRead more on Brainly.in - https://brainly.in/question/2417414#readmore
Because it is fly only earth and has gravity and earth \'s gravity apply on everything
7092.

Does kerosene freezes

Answer» Yes
Yes it can be freeze at -48 degree Celsius
Yes why not. Evry liquid have freeze... evry liquid have freezing point som have low soma have high
7093.

Wgere do i find the lab mannual ?? Its not available here?

Answer» It can be found in aarti stationary
7094.

Diagramatically show the difference between solid liquid and gas

Answer» \tPropertySolidsLiquidsGasesKinetic energyVery low (negligible)mediumVery HighRigidityHighly rigid - Posses fixed shapeNot rigid- gets the shape of the containerNot rigidFluidityParticles cannot flowComparing with gases very lowParticle can flowIntermolecular forcesVery highlow\xa0 Very low(negligible)Interolecular spaceVery low (negligible)highVery high\t
7095.

Why urethra become hard

Answer» The scar tissue causes the urethra to become gradually narrow, making it more difficult for urine to flow. Sometimes, the inflammation/injury to the urethra happens long before the stricture becomes noticeable. In other cases, the stricture happens soon after a urethral injury.
7096.

What is the effect of temperature on the solubility of a gas in liquids?

Answer» By changing the temperature we can increase the soluble property of a solute. Generally, water dissolves solutes at 20∘C or < 100∘C . Sparingly soluble solid or liquid substances can be dissolved completely by increasing the temperature. But in the case of gaseous substance, temperature inversely influences solubility i.e. as the temperature increases gases expand and escapes from their solvent.
The solubility of gas in liquids often decreases with rise in temperature.
7097.

What type of tissues are mode a b u n d a n t in plants

Answer» The most abundant, diverse, and versatile cells in a plant are found in the parenchyma tissue. This ground tissue is the tissue more abundant in plants.
7098.

20 extra questions answers of ch-5,6 bio

Answer» Like
Usa another helpbooks like like u, jph,arihant,oswal
7099.

Why desert cooler gives cool air

Answer» in a desert cooler hot dry air is sucked through wet pads of wood shavings .watre take up heat from hot air as it evapourates.Due to faster rate of evapouration,desert cooler gives coo air.
A desert cooler works on the principle of evaporation. On a hot dry day the amount of water vapour/humidity content in the air is less.As we alrady know that evaporation increases when the humidity content in the air is less. So a desert cooler cools better on a hot dry day.
The cooling in a desert room cooler is due to the process of evaporation.
7100.

Name the process by which pure solid can be separated from solution in crystal from

Answer» crystallization