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When a hot substance is placed in a thermos flask, the heat going out gets REFLECTED due to the shining surface of the inner tube. HENCE,heat is radiated. Neither conduction nor convection of the heat occurs because of the vacuum. As a result,heat is not transferred to the outer cooler region and is retained inside for a long time. Still, a little heat is lost from around the lid and by a small amount of conduction through the glass. Therefore, the hot substance does not remain as hot after TWO and THREE hours.

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FORCE = MASS X acceleration
F = ma
= 0.5 x 2
= 1N

it REMAINS UNAFFECTED by IMMERSION in WATER.

Hi friend here is your answer to this QUESTION that the appliances or the house hold CIRCUIT were PROTECTED by the use of MCB miniature circuit breaker , Fuse and Earthing .

Hope this will help you

2π RADIANS = 360°

=> π radians = 180°

1 Radian = 180° / π degrees

=> π / 180 radians = 1 degree

1 degree = 60 MINUTES

=> 1 minute = 1 degree / 60

=> 1 minute = π / 180 / 60

=> 1 minute = π / 10800 radians

=> 1 minute = 0.000290888 radians

=> 1 minute = 2.9 * 10⁻⁴ radians

The coming down of CONDENSED water in the form of water droplets, ice PARTICLE, sleet ETC. to the earth SURFACE is CALLED precipitation....

We observe ot because COLD water CONDENSES th air surrounding it
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We know that plasma is an IONIZED gas.
in a flame sometimes the TEMPERATURE is HIGH enough to KNOCK the protons and free their electrons.
by this we can say that containing plasma depends on the temperature of flames .
so some flames contain Plasma and some doesn't.

This force is called an IMPULSIVE force.The impulsive force is much stronger than any other force AVAILABLE at that point of time and acts on an object for a very short INTERVAL during COLLISION or EXPLOSION. It is defined as the rate of change of momentum. Impulse =mv-mu(momentum change)

Proof. When we can show that Newton’s first and third law are CONTAINED in the second law, then we can SAY that it is the real law of motion.
(i) First law is contained in second law: According to Newton’s second law of motion,



It means that there will be no ACCELERATION in the body if no external force is applied. This represents that a body at rest will remain at rest and a body in uniform motion will continue to MOVE along the same straight line in the absence of an external force. This CORRESPONDS to Newton’s first law of motion. So, first law of motion is contained in Second law of motion

The molecules of methylated spirit get the energy they NEED from our hand, leaving the molecules of the hand with less energy and so colder. ... As the ether evaporates pump into the air BUBBLES it takes away heat energy from the tube, LOWERING its TEMPERATURE. Ice will start to form on the outside of the test tube.



Procedure

Put TWO thermometer A and B in a beaker containing water and note their reading. Take one of them, say A to be STANDARD and find the CORRECTION to be applied to the other, say B.Put thermometer B in copper tube of hypsometer containing the power of given solid. Put sufficient water in hypsometer and place it on a burner.WEIGH the calorimeter with stirrer and lid over it by the physical balance. Record it.Fill about half of calorimeter with water at about temperature 5 to 8°C below room temperature. Now, weigh it again and record it.Heat the hypsometer about 10 minutes TILL the temperature of solid remains steady.Note the temperature of water in the calorimeter. Now, transfer the solid from hypsometer to the calorimeter quickly. Stir the contents and record the final temperature of the mixture.Remove the thermometer A from calorimeter and weigh the calorimeter with its contents and lid.

When earth ROTATES it produces some centrifugal force on the objects on its SURFACE. The VALUE of this centrifugal force is highest on EQUATOR and LOWEST on poles. ... So if earth stops rotating then the value of g will increase at equator to poles in descending order.

HERE IS YOUR ANSWER....

When you put a
THERMOMETER in cold fluid the molecules c CONTRACT, making the volume less.
When a mercury thermometer is IMMERSED in a HOT liquid, the mercury LEVEL goes down.

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The ANSWER is 42 POWER 44

Rancidification is the decomposition of fats, oils and other lipids by hydrolysis or OXIDATION, or both. ... Example: We have often noticed that when keep FRIED CHIPS OUTSIDE for a long time it starts giving UNPLEASANT smell andtaste,this is due to rancidity.

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good evening_____________✌️✌️✌️✌️✌️




unit of pressure in the SI SYSTEM is the PASCAL(PA), defined as a force of ONE Newton per square meter

A) The BOX will SINK as the density of the box is greater than the density of water ,i.e. 1.4 g/cm³ > 1g/cm³
B) According to the ARCHIMEDES principle, the mass of the water displaced will be same as the mass of the object which is displacing the water.

I THINK it's a positive
if it's WRONG then TELL me

(a) False :
Work and Energy has same units i.e. Joules.

(b) False :
When an aeroplane takes off, it DISPLACES in upward direction but gravity force acts in DOWNWARD direction.
=> Work done by gravity force here is negative .

(c) False :
The potential energy of a spring is is always increases whether it compresses or extended .
Work done by external Force to compress or extend acts OPPOSITE to the spring force which is stored as potential energy.

(d) True :
When work done by external Force is negative then Mechanical energy of the system decreases when compared to zero / Positive work done on the system.

(e) False :
When a body is FALLING from some height ,then speed of body increases due to gravitational force, hence Kinetic energy increases.

(f) True
The SI unit of power is Watt.

b) The MAJORITY of the atom must CONSIST of EMPTY SPACE.

ANSWER:

i THINK its BECAUS of the THERMAL conductivity

Explanation:

Heat may be transferred by means of conduction, convection, or radiation. Conduction is the transfer of thermal ENERGY (heat in transfer) DUE to collisions between the molecules in the OBJECT. Collisions betweenadjacent ATOMS and moleculestransfer kinetic energy from the warmer to the cooler object.

ANSWER KAIDE SE d HONA CHAHIYE

Answer:

Metel piece is colder than wooden piece.

expalation:

Because METAL is losses heat energy and GAINS called energy than wooden piece.

The metals are good CONDUCTOR of heat. the FACT that you feel metal OBJECTS are colder their student objects.

so metal piece is colder than wooden piece

Centre of the gravity CJ of a body is the point about with the algebraic sum of the moments of weights of all the particles constituting the body is zero the entire weight of the body can be considered to act at this point how some howsoever the body is placed for EXAMPLE the position of a centre of a gravity of a body of a given mass DEPENDS on its shape for example on the distribution of a mass of a particles in it changes if the body is deformed for example the centre of gravity of a uniform WIRE is the time at the middle of the length but if the same wire is bent into the form of a Centre circle is centre of gravity will then be at the centre of the circle ...... !!!!!!!!!!!!!!!!!!!!!!!!!!!

hope it MAY help ...!!!!!!!!!!!!!!!!!

Given conditions ⇒

Number of molecules = 6.022 × 10²³

Molar mass of the N₂ = 28 G/mole.

∵ No. of molecules = Mass/Molar mass × Avogadro's number.

∴ 6.022 × 10²³ = Mass/28 × 6.022 × 10²³

∴ Mass = 1 g.

HENCE, the mass of the Nitrogen gas CONTAINING 6.022 × 10²³ is 1 g.

HOPE it helps.

No. of atoms=3.011×10²³
we know that :
no. of atoms= no.of MOLES×avagadros no.
3.011×10²³=no. of moles ×6.022×10²³
no. of moles=1/2=0.5 mol
we know that:
no. of moles= required MASS/ MOLECULAR mass
required mass= molecular mass/2 .
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Answer ⇒ 3.011 × 10²³ atoms.

SOLUTION ⇒

No. of MOLES of Nitrogen atoms = 0.5

Avogadro's number = 6.022 × 10²³

Using the FORMULA,

No. of atoms = No. of moles × Avogadro's number.

∴ No. of atoms = 0.5 × 6.022 × 10²³

∴ No. of atoms = 3.011 × 10²³ atoms.

Hence, the number of the atoms in 0.5 MOLE of the N atoms is 3.011 × 10²³.

Hope it helps.

Hey there!

Washing Soda also Chemically called as

Sodium CARBONATE is used for many house HOLD & industrial purposes .

It's Chemical formula is

As I already mentioned, It's chemical name is Sodium carbonate .

It is a base, and turns red LITMUS paper to blue.

It is a water soluble base, Hence it is a alkali.

And

:

Used in laundry

It is also used to manufacture sodium COMPOUNDS like BORAX

Also used to a large extent in glass, paper and soap industry .

An agent for removing permanent hardness of water.

Soda WATER is generally referred to as water that contains low LEVELS of pressurized carbon dioxide. This imparts a characteristic fizz and SLIGHTLY sour flavor which makes it tastier that regular plain water. It is also considered a zero-calorie drink. It is also very effective at hydrating the human body. It also HELPS in impaired digestion of people suffering from dyspepsia and CONSTIPATION.

A SOLUTION is a HOMOGENEOUS MIXTURE of TWO or more SUBSTANCE.

Save WATER salt water form a sea or a ocean when mixing of FRESHWATER RUNOFF from RIVER mouth NEAR melting Glacier

No it absore only SEA WATER,AIR,SODA water

Answer:

VINEGAR is a homogeneous solution

Explanation:

A heterogeneous mixture is SIMPLY any mixture that is not uniform in COMPOSITION - it's a non-uniform mixture of smaller constituent parts

heterogeneous mixture has components whose proportions VARY throughout the sample

A homogeneous mixture is a solution that has equal proportions of its components throughout any GIVEN sample

Vinegar is a homogeneous solution, because it is a completely uniform solution.

Vinegar is composed of water and acetic acid, and acetic acid is soluble in water.

Basically,wood is a HETEROGENEOUS MIXTURE because it can be separated by any PHYSICAL process

It is HOMOGENEOUS MIXTURE because it is DISTRIBUTED UNIFORMLY (EQUALLY).

3943.15 in KELVIN

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570k is EQUAL to the 296.85 degree CELSIUS.. .

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Hello.

ACTIVITY to show evidence for attraction between PARTICLES is shown below:

1. TAKE a Nail Piece and a piece of cotton.

2. Try to break them.

Observations ⇒ When you will try to break them, you will come to know that nail which is made up of the Iron is very hard to break. Thus, we can say that the particles of the matter(which occupies space) have INTER molecular forces acting between successive atoms .

This Proves the aim of the Activity.

Hope it helps.

A SUBSTANCE CAPABLE of BECOMING sufficient low temperature a substance in a SUPERCONDUCTING state