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ANSWER:

Osmosis (/ɒzˈmoʊ. sɪs/) is the spontaneous net movement of solvent molecules through a selectively permeable membrane into a region of higher solute CONCENTRATION, in the direction that tends to equalize the solute CONCENTRATIONS on the TWO sides.

characteristics of standard unit: (i) It should be EASILY understandable. (II) It should be CHANGED with CHANGE in physical factors. (iii) It should not change with place or TIME.

ANSWER:

coulomb is si UNIT of CHARGE(Q)

➠As medium A have refractive index 1.33 and medium B have refractive index 1.5,since we get that Medium A is rarer medium as compared to medium B .Thus in medium A the light will travel faster as compared to medium B.

Moreover As medium B is denser so the light will BEND its path towards normal ( perpendicular) to travel in medium.This PHENOMENON is also known as refraction of light.

⇒Additional detail:-

• When light travels in rarer medium then it is away from normal and when it travels to denser medium it bends toward normal and change its path.

• Relative refractive index: When light travels from one medium to another medium, then the refractive index is known as the relative refractive index.

• Absolute refractive INDES: When light travels from VACUUM to another medium, then the refractive index is known as the absolute refractive index.

• A ray of light travelling FORM a rarer to a denser medium slows down and bends towards normal .When the ray of light travels form a denser to rarer medium, it speeds up and bend away from normal.

• When speed of light in a medium is smaller ,its refractive index is larger .The medium is said to be optically denser .And when speed of light is larger and ,its refractive index is smaller then the medium is said to be optically rarer.

Answer:

3 m/s

Explanation:

Given,

Mass ( m ) = 40 kg

Kinetic energy ( K.E ) = 180 J

To FIND : SPEED ( v ) = ?

K.E = ( m v^2 ) / 2

2 X K.E = m v^2

v^2 = ( 2 K.E ) / m

      = ( 2 x 180 ) / 40

      = 360 / 40

v^2 = 9

v = √9

v = 3 m/s

Therefore, the speed is 3 m/s.

The refractive INDEX of DIAMOND is 2.42. This means that the speed of light in diamond will reduce by a FACTOR of 2.42 as compared to its speed in AIR. In other words, the speed of light in diamond is 1/2.42 times the speed of light in VACUUM.

ANSWER:

unit charge

Explanation:

the charge of TEST PARTICLE should be 1 C

ANSWER:

OPTION C EXOTHERMIC..........

Explanation:

If you put a LIQUID like OIL between two solid gears, it will SHIFT about and CHANGE its shape as much as it needs to, cushioning the microscopic bumps between the gears as they mesh TOGETHER and reducing the friction between them. ... The layers will slide freely past one another, so helping to reduce friction

Answer:

The REFRACTIVE index of glass with respect to air is 2. Then the critical angle of glass-air interf... If the angle of incidence for a LIGHT in air to glass is 45DEGREE and its angle of refraction be 30... The refractive index of glass for light GOING from air to glass is 3/2.

ANSWER:

ANSEER is ATTACHED above

ANSWER:

Rubber will have the HIGHEST INERTIA.

Because as steeland is not STRETCHABLE it has LESS inertia as compared to rubber.

The difference between mass and WEIGHT is that mass is the amount of MATTER in a MATERIAL, while weight is a measure of how the force of gravity acts UPON that mass. Mass is the measure of the amount of matter in a body. Mass is denoted using m or M. ... Weight is mass MULTIPLIED by the acceleration of gravity (g).

Answer:

A transverse wave is a moving wave that consists of oscillations occurring perpendicular (or right angled) to the direction of energy TRANSFER. If a transverse wave is moving in the POSITIVE x-direction, its oscillations are in up and down directions that LIE in the y–z plane. Light is an example of a transverse wave.

Answer:

Most common applications for solar THERMAL energy used in industry are the SWHS, solar dryers, space heating and COOLING systems and water desalination. Solar as an input power is WIDELY used for heat engines in many INDUSTRIAL applications.

Answer:

Yes god made the WHOLE COUNTRY MEANS whole THINGS ..He is very great .

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EXPLANATION:

If N(A) = m and n(B) = n ; then n(A × B) = mn .What is the VALUE of n(A × B) = mn . if m = 6 and n = 8

Answer:Yes, a body with a velocity 0 can still accelerate. The SIMPLEST example is a body which is THROWN up. At the peak point its velocity BECOMES 0 but still accelerates due to gravity.

Explanation:

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Answer:

To calculate the energy required to raise the TEMPERATURE of any given substance, here's what you require:

The MASS of the material, m.

The temperature change that occurs, ΔT.

The specific heat capacity of the material, c (which you can LOOK up). ...

Here is a source of VALUES of c for DIFFERENT substances:

Q=m×c×ΔT.

1/f =1/v+1/u

1/-15=1/v+1/-20

1/-15+1/20=1/v

-4+3/60=1/v

-1/60=1/v

v=-60

m =h`/h=-v/u

=h`/5=-(-60)/-20

=h`=5×60/-20

h`=300/-20

h`=-15

IMAGE of DISTANCE is -60cm

hieght of image is -15

image is real and inverted

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1 dioptre of POWER of a lens is described as the unit of measurement of the optical power of a lens or CURVED mirror equivalent to the reciprocal of focal length (f). Measurement of the focal length in a meter. The SI unit of power of lens is dioptre whose focal length is ONE meter, which is denoted by the letter D.

I hope my answer helps you.....✌

The AMOUNT of energy NEEDED to RAISE the temperature of 1 g of water by 1 degree Celcius or (1 Kelvin) equals 1 calorie. And 1 calorie equals 4,184 Joule. So if you want to raise the temperature of 1 litre of water (1 litre = 1000g for water) by 80 degrees Celcius, your calculation should look like this: 1000g*4,184J/(g*°C)*80°C= 334 720 Joules

1 kWh = 3 600 000 Joules, because 1 watt of power during 1 second equals 1 Joule. So 3600 seconds in 1 hour multiplied with a power of 1000 Watt equals 3 600 000 Joules.

334 720 / 3 600 000 = 0,093 kWh of energy to heat 1 kg of water from 20 °C tot 100 °C

If you want to deliver 0,093 kWh in 1 minute instead of 1 hour, the required power output during that minute would be 0,093*60 = 5,58 kW or 5580 Watt.

This also passes the common SENSE test since a regulator water boiler (for coffee etc.) outputs around 1500 to 2000 watt and using such as device to cook a full litre of water takes more than 1 one minute, more like 3 to 4 minutes which is to be expected if you go through the math.

ANSWER:

Take V volume of water.

So, we have V\rhoVρ mass of water.

Take V volume of the liquid as WELL (we're instructed to do that).

So, 1.5\rho V1.5ρV mass of liquid.

Total mass = 2.5\rho V2.5ρV , and total volume = 2V2V .

So, final RELATIVE density = 1.25 (total mass / (total volume * density of water))

PLZ CHECK the ATTACHMENT....HOPE it HELPS you...

Answer:

Light waves are electromagnetic waves while sound waves are MECHANICAL waves. Light waves are TRANSVERSE while sound waves are LONGITUDINAL. Light waves can travel in VACUUM. Sound waves require a material medium to travel, and hence, cannot travel in vacuum.

Explanation:

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ANSWER:

1 F

2e

3a

4h

5b

6g

7c

8d

Explanation:

this is the answer

ANSWER:

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EXPLANATION:

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Answer:

2cm....................

Explanation:

GIVEN,

l=0.1m=1000mm

d=0.2mm∴radius(R)=

2

0.2

=0.1mm

R=10Ω

To FIND,

Resistivity(ρ)

ρ=R

l

A

where,

R= Resistance

l= Length of wire

A= Cross SECTIONAL area of wire

Cross sectional area of cylinder (A)=Πr

2

⇒A=π×(0.1)

2

⇒A=0.0314mm

2

∴ρ=10(

1000

0.0341

)

⇒ρ=0.000314Ω−mm

⇒ρ≃3.14×10

−7

Ω−m

So, the resistivity of the material is equal to 3.14×10

−7

Ω−m

FOLLOW the GIVEN attatchmnt

ANSWER:

Do 2.5 + 60 =

EXPLANATION:

The answer U GET is that

The slope of a velocity GRAPH represents the ACCELERATION of the object. So, the VALUE of the slope at a particular time represents the acceleration of the object at that instant.

I hope my answer HELPS you .....✌

ANSWER:

3 is UR answer....✌✌

Explanation:

HOPE U UNDERSTAND...✌✌

EXPLANATION:

Write summary on musical instruments that you know and explain how they produce sound

Instruments, one way or another, make sounds, and all sounds are vibrations which TRAVEL ACROSS PARTICLES that make up the air around us (for humans anyway). ... A musical INSTRUMENT, in short, might itself vibrate, or have a part that vibrates, or amplifies and/or modifies another vibration

ANSWER:

THANK you so so so so MUCH.......... pornima........ .

Answer:

An asana is a body posture, ORIGINALLY and still a general term for a sitting meditation pose,[1] and later extended in hatha yoga and modern yoga as exercise, to any type of pose or position, adding reclining, standing, inverted, twisting, and balancing poses. The Yoga Sutras of Patanjali DEFINE "asana" as "[a position that] is steady and comfortable".[2] Patanjali mentions the ability to sit for extended periods as one of the eight limbs of his system.[2] Asanas are also called yoga poses or yoga postures in English.

The 10th or 11th century Goraksha Sataka and the 15th century Hatha Yoga Pradipika identify 84 asanas; the 17th century Hatha Ratnavali provides a different list of 84 asanas, describing some of them. In the 20th century, Indian nationalism favoured physical culture in response to colonialism. In that environment, pioneers such as Yogendra, Kuvalayananda, and Krishnamacharya taught a new system of asanas (incorporating systems of exercise as well as traditional hatha yoga). Among Krishnamacharya's pupils were influential Indian yoga teachers including Pattabhi Jois, founder of Ashtanga vinyasa yoga, and B.K.S. Iyengar, founder of Iyengar yoga. Together they described hundreds more asanas, revived the popularity of yoga, and brought it to the Western WORLD. Many more asanas have been devised since Iyengar's 1966 Light on Yoga which described some 200 asanas. Hundreds more were illustrated by Dharma Mittra.

Asanas were claimed to provide both spiritual and physical benefits in medieval hatha yoga texts. More recently, studies have provided evidence that they improve flexibility, strength, and balance; to reduce STRESS and conditions related to it; and specifically to alleviate some diseases such as asthma[3][4] and diabetes.[5]

Asanas have appeared in culture for many centuries. Religious Indian art depicts figures of Buddha, Shiva, and Jain tirthankaras in lotus position and other meditation seats, and in the "ROYAL ease" position, lalitasana. With the popularity of yoga as exercise, asanas feature commonly in novels and films, and sometimes also in advertising.

EXPLANATION:

A measure of a fluid's resistance to flow. Viscous forces in a fluid are PROPORTIONAL to the RATE at which the fluid velocity is changing in space; the proportionality constant is the VISCOSITY.

ANSWER:

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Rusting of iron :

Rusting of iron refers to the formation of rust, a mixture of iron oxides, on the surface of iron objects or structures. This rust is formed from a redox reaction between oxygen and iron in an environment containing WATER (such as air containing high levels of moisture). The rusting of iron is characterized by the formation of a layer of a red, flaky substance that easily crumbles into a powder.

Rusting of Iron

This phenomenon is a great example of the corrosion of metals, where the surfaces of metals are degraded into more chemically stable oxides. However, the term ‘rusting’ is generally used to REFER to the corrosion of objects made of iron or iron-alloys.

What is the Chemistry Behind the Rusting of Iron?

The exposure of iron (or an alloy of iron) to oxygen in the presence of moisture leads to the formation of rust. This reaction is not instantaneous, it generally proceeds over a considerably large time frame. The oxygen atoms bond with iron atoms, resulting in the formation of iron oxides. This weakens the bonds between the iron atoms in the object/structure.

The reaction of the rusting of iron involves an increase in the oxidation state of iron, ACCOMPANIED by a loss of electrons. Rust is mostly made up of two different oxides of iron that VARY in the oxidation state of the iron atom. These oxides are:

Iron(II) oxide or ferrous oxide. The oxidation state of iron in this compound is +2 and its chemical formula is FeO.

Iron(III) oxide or ferric oxide, where the iron atom exhibits an oxidation state of +3. The chemical formula of this compound is Fe2O3.

Oxygen is a very good oxidizing agent whereas iron is a reducing agent. Therefore, the iron atom readily gives up electrons when exposed to oxygen. The chemical reaction is given by:

Fe → Fe2+ + 2e–

The oxidation state of iron is further increased by the oxygen atom when water is present.

4Fe2+ + O2 → 4Fe3+ + 2O2-

Now, the following acid-base reactions occur between the iron cations and the water molecules.

Fe2+ + 2H2O ⇌ Fe(OH)2 + 2H+

Fe3+ + 3H2O ⇌ Fe(OH)3 + 3H+

The hydroxides of iron are also formed from the direct reaction between the iron cations and hydroxide ions.

O2 + H2O + 4e– → 4OH–

Fe2+ + 2OH– → Fe(OH)2

Fe3+ + 3OH– → Fe(OH)3

The resulting hydroxides of iron now undergo dehydration to yield the iron oxides that constitute rust. This process involves many chemical reactions, some of which are listed below.

Fe(OH)2 ⇌ FeO + H2O

4Fe(OH)2 + O2 + xH2O → 2Fe2O3.(x+4)H2O

Fe(OH)3 ⇌ FeO(OH) + H2O

FeO(OH) ⇌ Fe2O3 + H2O

One similarity between all the chemical reactions listed above is that all of them are dependent on the presence of water and oxygen. Therefore, the rusting of iron can be controlled by limiting the amount of oxygen and water surrounding the metal.

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ANSWER:

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Given :

• Mass of boy, m = 40 kg

• VELOCITY, v = 6.0 m/s or 6 m/s

To find :

• Momentum of boy, p

According to the QUESTION,

We know that,

Momentum is product of mass and velocity.

So,

➞ Momentum = Mass × Velocity

Or,

➞ p = m × v

➞ Substituting the values,

➞ p = 40 kg × 6 m/s

➞ p = 240 kg m/s

So,the momentum of boy is 240 kg m/s.

_____________________________

More details :-

• SI UNIT of momentum is kg m/ s.

• Momentum can be DENOTED as 'p'.

• Momentum is VECTOR quantity.

EXPLANATION:

bjyhñgyif. ivofjff vfpfpjojf. fouf. OFU OUF ofu ouf ouf

ANSWER:

I am THINKING OPTION C........

Answer:

200 watt

Explanation:

Answer:

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EXPLANATION:

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Answer:

TAKE mean of different VALUES of diameter. MEASURE the length of the WIRE by stretching it along a half-metre scale. Keeping one end of wire at a known mark, note the position of other end. Difference in position of the TWO ends of the wire gives the length of the wire.

ANSWER:

N-Nitrogen

Na-Sodium