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ANSWER:

Key Difference Convex and Concave LENS. ... In the convex lens, the curve is outward FACING, whereas, in the concave lens, the curve FACES inward. When the light rays pass through the convex lens, it converges the light rays and focuses on ONE point

Heya!!

_________________________⭐⭐⭐

Resistivity is the property of a material through which it opposes the FLOW of current.

→ SI unit is rho

→ where,

R = rho L/A

rho = RA/L

→ For metals ... resistivity increases with increase in temperature

→ for SEMICONDUCTORS... it's value decreases with increase in temperature.

hope it helps!!

#PhoeniX

ANSWER:

The AIR CONSIST in ATMOSPHERE

ANSWER:

dioptre

Explanation:

HOPE this HELPS u

mark me as BRAINLIEST

ANSWER:

gfdh

Explanation:

Answer:

Option A.

Explanation:

Vander Waal's UNIVERSAL equation for a non ideal gas :

 ( P + a/v² ) * (V - b) = n R T

with the symbols having the given meanings.

P = pressure. V = VOLUME. R = Universal Gas constant. T = absolute temperature. n = number of moles of the gas.

SINCE P has DIMENSIONS of Force/Area, a/V² also will have the same units and dimensions.

P = [ M ] [ L⁻¹ ] [ T⁻² ] = a / V² = a [ L³ ]⁻²

So constant a = [ M ] [ L⁵ ] [ T⁻² ]

Since b has same units and dimensions as that of V,

  b = [ L³ ]

Then the ratio b/a will have the dimensions:   [ M⁻¹ ] [ L⁻² ] [ T² ]

Answer is the option (A).

Answer:

hey here u go

Explanation:

ohms law STATES that the ratio of potential DIFFERENCE ACROSS the conductor and the current passing through it is constant which give RIDE to a new quantity called resistance that is the potential difference across the conductor is DIRECTLY proportional to the current flowing through it

v directly proportional to I

v/i = k ( k= some constant)

v/i = r

V = iR

this is ohms law

ANSWER:

There's basically zero CHANCE of me not doing a speed ... At one point in the past, I was a teenager. ... It's one of the quickest PRODUCTION cars ever made .

Answer:

what are you ASKING??? If you giving a FACT mark as BRAINLEST

Since force= kq1q2/r'2

since q1= -q2 (the fundamental law of nature-conservation of charnges)

so force =kq'2/r'2=10N

since r=1m.

kq'2=10

since k=8.85*10'(8)

then q'2=10/k

put the value of k the take the root of the no. you got that will give you q.

and since 1 ELECTRON has charge= 1.62*10'(-19). so the no of electrons will be =q/(1.62*10'(-19))

that's it.

if you didn't get anywhere ask.

note- appstrope has been USED to represent the POWER of a no.

Current REMAINS CONSTANT when resistance connected in PARALLEL
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Answer:

U= -10 cm

f= 15 cm

1/f = 1/v + 1/u

So, 1/v= 1/f - 1/u

1/v= 1/15 + 1/10

1/v = (2+3)/30 (lcm)

THEREFORE v=5/30 = 6 cm

Hence the IMAGE is formed behind the mirror and therefore it is VIRTUAL and ERECT

Explanation:

Resistance is defined as the property of a conductor to RESIST the FLOW of CHARGES through it. The resistance of conductor is numerically given as the ratio of potential difference ACROSS its LENGTH to the current flowing through it.

Explanation:

Given: g=9.8

Total time=12 sec

1) Total time is 12 sec

Time taken to go up=Time taken to get down

So t=6sec

and at max height v= 0

By equation of motion

0=u - gt( - SIGN for UPWARD direction)

u= 9.8 (6)

u=58.8 m/s

2) At max height v=0

u=58.8

t= 6

By 2nd equation of motion

s=ut- 1/2gt2

s=(58.8×6)-1/2(9.8)(6×6)

s=352.8- 176.4

s=176.4m

3) Ball reached max height in 6sec

so, in 8SEC ball travelled for 2sec after reaching max height

which gives u=0

t=2sec. s=?

Again s=ut + 1/2gt2 ( + sign because ball is coming down)

s=0 + 1/2(9.8)(2×2)

s=19.6 m

Read more on Brainly.in - brainly.in/question/671209#readmore

EXPLANATION:

UNIFORM MOTION is the SIMPLEST TYPE of motion

Answer:

INCREASE reading by 1 degree CELSIUS

Explanation:

113 F in Celsius scale is 45 C

so it measures 44C

so DEVIATION is 1C

ANSWER:

a=v-u/t

therefore,

v-u=at

v=u+at (EQ 1)

displacement=average velocity*time

s=(v+u/2)*t

=(u+at+u/2)*t. ( since v=u+at)

=(2ut/2+at^2/2)

therefore s=ut+1/2at^2 (eq 2)

displacement=average velocity*t

s=(v+u/2) *t

s =(v+u/2)(v-u/a)

s=v^2-u^2/2a

therefore v^2=u^2+2as (eq 3)

hope it HELPS!!

Answer:

this is the curve

Explanation:

mechanism

Due to strain hardening, the FLOW stress increases with increasing strain. Temperature and strain rate influence greatly the stress-strain BEHAVIOR of materials. Increasing the temperature REDUCES the tensile strength, yield strength, increases ductility. DEFORMATION speed of the PROCESS, l .

Answer:

13 times

Explanation:

13 TIME HAI BHAI.......

Answer:

2%

EXPLANATION:

PHOTO DEKH LE BHAI.....

ANSWER:

Freezer is the source for the refrigerator's coldness. When the freezer is placed on top, the cold air PRODUCED from it is denser than the warmer air in the bottom. So cold air being dense sinks down and the warm air is FORCED to rise up so when the warm air rises up it and GETS cold in the freezer.

ANSWER:

no as it can NEVER be.....

10√2m/s

a=-g

s=20m

U=0

v=?

v^2=u^2+2as

v^2=40

v=10√2m/s

hope this HELPS u

EXAMPLES of vibratory motion are

stretching of RUBBER band

vibration of your MOBILE phone

buzzing of bees

flapping of WINGS

Answer:

The MOLECULES carrying the SOUND are attracted to their surrounding molecules. ... The amount of refraction depends on the speed of sound in the two mediums between which the wave is traveling. SINCE the speed of shear WAVES is SLOWER than the speed of longitudinal waves, their angles of refraction will be different.

ANSWER:

ɧıı ɬɧཞơ ყɛ զųɛʂɬıơŋ ცąཞ ცąཞ ɱɛཞɛ ℘ąʂʂ ɧı ƙყųŋ ąąɬą ɧąı

EXPLANATION:

╔═══╗───────╔╗

║╔═╗║───────║║

║║─╚╬══╦══╦═╝║

║║╔═╣╔╗║╔╗║╔╗║

║╚╩═║╚╝║╚╝║╚╝║

╚═══╩══╩══╩══╝

╔═╗╔═╗

║║╚╝║║

║╔╗╔╗╠══╦═╦═╗╔╦═╗╔══╗

║║║║║║╔╗║╔╣╔╗╬╣╔╗╣╔╗║

║║║║║║╚╝║║║║║║║║║║╚╝║

╚╝╚╝╚╩══╩╝╚╝╚╩╩╝╚╩═╗║

─────────────────╔═╝║

─────────────────╚══╝

ANSWER:

(3)7 I guess

Explanation:

its bcz max VALUE of SIN theta and COS theta is 1

-5(1)+12(1)

7

Nope, ONE cannot measure a passage of only 50 electrons due to high UNCERTAINTY of position and speed. (with respect to Heisenberg's uncertainty principle).

Though, one can set up some circuit or system, with presence of much more electrons and simplify the result USING UNITARY method.

Hope this HELPS! Have a good day!

️‍♂️

ANSWER:

because with RISE in temperature the melring point of COMPOUND decreazes that's why the density will also change

Answer:

PIC DEKH LO.....

Explanation:

see the pic BHAI....

EXPLANATION:

and later you can FIND percentage error in other value because true value is present

ANSWER:

SEE the IMAGE

Explanation:

see the image..... BROTHER

Answer:

WEIGHT.

Explanation:

The gravitational FORCE acting on an OBJECT is equal to its weight.

ANSWER:

YES

you are correct.

atmospheric

what is emf

Electromotive force, abbreviated emf, is the electrical action produced by a non-electrical source. A device that converts other forms of energy into electrical energy, such as a battery or generator, provides an emf as its output. Sometimes an analogy to water "pressure" is used to describe electromotive force

how can induce emf?

When an emf is GENERATED by a CHANGE in magnetic flux according to Faraday's Law, the polarity of the induced emf is such that it produces a current whose magnetic field opposes the change which produces it. The induced magnetic field inside any loop of wire ALWAYS acts to KEEP the magnetic flux in the loop constant.

Answer:

DEKH lo BHAI...

EXPLANATION:

ok Bhai pic Dekh LE

ANSWER:

UNIFORM motion

EXPLANATION:

MARK as BRAINLLIST

Answer:

PVC as it is highly non CONDUCTING to ELECTRICAL CURRENT and in long USE in future it has less environment bad effect

I Gusee There NEEDS To Be A SHADED AREA FIRST......... RIGHT?

ANSWER:

EXPLANATION:

Force=Mass ₓ gravity

2 KG ₓ 10 N/kg

=20 N

ANSWER:

Acceleration is 0.8 METERS per second squared. Displacement is 120 meters.

Explanation:

By using the formula for acceleration = (v - u)/t = (16 - 8)/10 = 8/10

= 0.8 m/s^2

Now we use the formula for displacement ( S ) = u*t + (a*t^2)/2

                                                                                 = 8*10 + (0.8*10^2)/2

                                                                                 = 80 + 40 = 120 meters

Answer:

TWINKLING of STARS is due to the phenomenon of refraction of light

HOPE IT HELPS YOU❣❣✨✨✌✌

1.There is a a positive charge particle I.e. Nucleus in the CENTRE of the atom.

2. There is LOT of EMPTY SPACE inside the atom.

Answer :

There are many conditions for no refraction --

• If the incident ray is going normally through the surface of contact of the TWO surface, then there will be no refraction.

• If the refractive index of the two mediums are EQUAL then there will be no refraction.

• If incident ray is greater than critical ANGLE of the medium then again no refraction and TOTAL internal reflection* will occur.

Example-- If light is passing through AIR and again air then no refraction. And if light is passing through air to water normally to the surface then no refraction.

EXPLANATION:

SEE ANSWER in the IMAGE

An ELECTRIC FUSE is a safety device used to LIMIT the CURRENT in an electric CIRCUIT. The use of a fuse is to safeguard the electric circuit and the electric appliances connected in the electric circuit from being damaged.

ANSWER:

SHAPE, SIZE and SPEED of an OBJECT

HELLO User❤️

Question :

Which of the following has least maginitude

A.ROLLING FRICTION

B.static friction

C.sliding friction

D.all of then have equal magnitude

Answer :

OPTION A .

Rolling Friction has the least magnitude ♥️

Hope this helps you BUDDY ❤️

#TheElegance

#Brainlyelegantdoll

this is because sheet of PAPER is THIN and area in contact of PIN is smaller this it exerts more PRESSURE THUS piercing the paper easily.

Answer:

This is a quantity measuring the ability of a SUBSTANCE to store ELECTRICAL energy in an electric field e.g. porcelain, mica, PLASTIC, GLASS and oxides of various metals

Explanation: