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ANSWER:

On passing through the polariser, the light is POLARIZED and now vibrates in a single plane. This is called plane-polarized light (PPL). In most UK microscopes the polariser is oriented to give an E-W VIBRATING incident light. One or two DIAPHRAGMS may be located below the stage.

EXPLANATION:

Graphene has attracted extensive INTEREST in the field of supercapacitor research DUE to its 2D structure which grants it exceptional PROPERTIES such as superior electrical CONDUCTIVITY and mechanical properties as well as an extensive surface area better than that of carbon nanotubes

POTENTIAL DIFF. is directly PROPORTIONAL to electric CURRENT

Answer:

★Sound is a vibration that propagates as an audible wave of PRESSURE through a transmission medium.

★They are created by the vibration of an object, which causes the air surrounding it to vibrate That is The pressure difference.

★A sound wave is the pattern of disturbance CAUSED by the movement of energy traveling through a medium

★Medium such as air, water any other liquid SOLID matter.

★ The source of vibrations can be ringing telephone, or a PERSON's vocal chords

★Sound is a type of Energy that can be TRANSFORMED from one form to another.

s=ut+1/2at^2

s=0×5+1/2×10×5×5

s=125meter

Explanation:

The same ACTIVITY can be done USING 2 mL of Dettol INSTEAD of potassium ... This SHOWS that there is enough space between particles of matter.

ANSWER:

'coz it rules

hope it will HELP

... At equator magnetic FILED lines are perpendicular to incoming cosmic RAYS and acts as a SHIELD. At POLES the magnetic field lines are almost along the axis of Earth and hence cosmic radiation can pass through.

ANSWER:

<U>ELECTROSCOPE

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ANSWER:

max height = 1.25 m

time taken = 0.5 sec

.

Explanation:

g = -10 m/s²

u = 5 m/s

v = 0

.

v² - u² = 2gh

=> 0² - 5² = 2(-10)H

=> -25 = -20h

=> h = 25/20 = 1.25 m

.

therefore,

max height attained = h = 1.25 m

.

v = u + gt

=> 0 = 5 + (-10)t

=> 10T = 5

=> t = 5/10 = 0.5 sec

.

therefore,

time taken to reach max height = t = 0.5 sec

.

Hope this helps :)

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●Using SIGN conventions USE the formula:-

1/v + 1/u = 1/ f

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ANSWER:

The TOTAL pressure is 12.5 pascel.

Explanation:

Pressureis given by FORCE / AREA.

here FORCE=25N & AREA =2m^2

hence pressure =25/2=12.5 pascel.

Hope it helps you...

Answer:

es get wider as the distance from the charges increases? ... The maximum rate of CHANGE of potential while going from ONE EQUIPOTENTIAL surface to other ( next) gives the DIRECTION and strength of the corresponding field.Feb

Answer:

S is called Planck's CONSTANT. Since the energy goes up as the frequency increases, the energy is DIRECTLY proportional to the frequency. Because frequency and wavelength are related by a constant (c) the energy can ALSO be written in TERMS of wavelength: E = h. ... That is, energy in inversely proportional to wavelength.

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ANSWER:

Q=CV(Q= CHARGE, C=capacitance, V= POTENTIAL)

SEE when connected in series the current will become twice

such that i1=2 i2

Whike connecting in parallel will KEEP the current flowing will remain the same ie i1=I3

now following these norms we will evaluate the equation

lwts take i1 as X then i3wil ALSO be x

while i2 will be wx

Lhs=3 i3 i2

=3*x*2x

=6x^2

Rhs=2 i1(i2+i3)

=2x(2x+x)

=2x*3x

=6x^2

Lhs =RHS

Hence proved

Hope it helps you mate.

Answer:

hey mate here is your answer

Explanation:

Calibrated at 27°C, RANGE of 0.995 to 1.030 g/ cc, graduation lines at INTERVAL of. 0.0005 ... 2: Laboratory SETUP for Hydrometer Test ... each of the other MAJOR calibration marks ...

(:

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●Halfed is the REQUIRED ANSWER.

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ANSWER:

The question you have ASKED is not CORRECT.Plz correct it and then ASK

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ANSWER:-

➡️Unitary Operators.

A linear operator WHOSE inverse is its adjoint is called unitary. These operators can be thought of as generalizations of complex numbers whose absolue value is 1. Like HERMITIAN operators, the eigenvectors of a unitary MATRIX are ORTHOGONAL. HOWEVER, its eigenvalues are not necessarily real.

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EXPLANATION:

ACTUALLY, during rain, the rain water which falls on the earth , gets heat from it and converted into water vapor which REMAINS suspended in the air so that the humidity level increases and so, the sweat is not being evaporated and our BODY could not be able to cool as earlier and so we feel the heat as UNBEARABLE,

Explanation:

Concave mirrors (which are spherical-SURFACE segments with the center bulging nearer to the viewer) do the following to all objects visible within the mirror's borders:

All incoming light is reflected in divirging directions, so that they appear to come from objects “behind” the mirror, and therefore smaller than they are in real life (or would appear if their light was bounced off of a plane mirror, like the one on the driver's side.)

Because they appear smaller they appear farther away, which is an admitted difficulty if the driver is a total neophyte who has never had any driving instruction, or has never had this EXPLAINED to them, even once. This is why the warning is etched into the mirror's surface, a permanent monument to the Auto Mirror Manufacturer's eternal low opinion of all drivers' intelligence level.

However, the up sided of this downside is that the images formed on your retina are always erect and reversed, meaning that no matter how far your eyes are from the mirror the scene appears exactly as it would if you turned around in your seat and looked out the back window, bar three things:

The scene is reduced in size in the mirror, so if you rotate to look out the back window, things will appear to be the size (and distance) that they actually are,

The back window may be smaller than “optimum”, so the scene may be vignetted by the edges of the window and downright blocked by the Sideposts,

The act of turning yourself around while driving is so heinous and dangerous an act that auto designers put the mirrors there to use… so why not do so?

And, in fact, there is a distance from the convex mirror where all light from the scene is turned into parallel rays, which your eyes try to turn into a spot.

The rest of the distances you might see, show objects turned UPSIDE down, and are even more frustrating to use for navigation clues than a concave mirror could ever be, so if you had a convex mirror, it is far more likely to be USEFUL to plucked your eyebrows or shave your chin than for driving.

hope it helps u....

Answer:

3 OPTION is correct on decreasing length angle will ALSO INCREASE.

Answer:

is the answer

Fleming's LEFT Hand Rule

=>

Stretch your index finger, the middle finger and THUMB of the left hand such that they are perpendicular to each other.

If the index finger is in the DIRECTION of magnetic field and the middle finger points in the direction of CURRENT , the thumb will point towards the direction of the force on the conductor.

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This is Fleming's Left Hand Rule.

Explanation:

Let I1 , m1 , R1 be a moment of inertia,MASS,radius of a solid before INCREASE by 1% Since m1 and r1 are increases by 1%. And I2 , m2 , r2 be moment of inertia ,mass , radius of a solid after .

Answer:

DELTA dt refers to DIFFERENTIATION of the QUANTITY.It means that the the quantity would be differentiated with RESPECT to anotger quantity.

While∆t refers to change.(It's a greek alphabet which literally is symbolic if change)

It means that ∆t will tell you the change in time over a certain period.

Like the example here

initial time 3:20 and final time 5:40

so the chnge in time is demonstrated by ∆t between the two times=5:40-3:20=340min-200min=140m

hence ∆t i.e. change in time is =140m

The same applies for ∆v or ∆ d

Hope it cleared all your doubts and if there are still some doubts then comment about it and I will update the answer accordingly to ckear your further doubts.

Explanation:

A venturimeter is a device use to measure the rate of FLUID PER UNIT . FLOWING through a PIPE.

perimeter = 12

side = 12/3 = 4

let axis pass through BD.its perpendicular BISECTOR and its equilateral triangle so it will pasd through A

As PARTICLE is at A also so its moment of inertia along axis is 0

So Moment is DUE to B and C

BC= CD = 4/2 = 2

SO Moment of inertia = 2 M( BC)^2

= 2 (2)( 2)^2

= 16

Answer:

Rolling FRICTION is the resistance to MOTION experienced by a body when it ROLLS upon another. It is much less thansliding friction for same pair of bodies. When one body rolls upon another, there is theoretically no sliding or slip between them. And if both are perfectly RIGID, there is no surface of contact.

hii mate some questions here

1. What is the difference between a conductor and an insulator?

2. What is the difference between open and closed circuits? Draw diagrams for both.

3. Define parallel connection and series connection.

4. What are the disadvantages of heating effect of current?

5. What are the advantages of heating effect of current?

6. What is electric current?

7. What is potential difference? Give its unit with definition.

8. Find the expression for calculating heat.

9. A wire is 1m long, 0.2mm in diameter and has resistance of 10Ω. CALCULATE its resistivity.

10. Calculate the area of cross section of a wire of length 2m, its resistance is 25Ω and the resistivity of material of wire is 1.84*10-6 Ωm.

11. Calculate the energy consumed by 120W toaster in 20 minutes.

12. What is resistance of conductors? Name TWO metals which are highly resistant.

13. Why is tungsten metal used in BULBS but not in fuse wires?

14. Define the terms Watt and VOLT.

ANSWER:

If the electron is moving in a wire we have a current. ... In order for an electron to radiateElectromagnetic (EM) radiation, it needs toaccelerate. REMEMBER, acceleration MEANS its velocity needs to change, which can be ACHIEVED either by changing the electron's speed or its direction

Answer:

we feel more cold after TAKING BATH with hot WATER because of the cooling effect of EVAPORATION that means when hot water pour on BODY it takes energy from our body to evaporate then we feel cool

Because an increase in heat is just an increase in the vibrational ENERGY of the ATOMS, or molecules of a SUBSTANCE. So if you increase the temperature and hence the heat, there is more movement (vibration) in the atoms which TRANSLATES to more KINETIC energy.

ANSWER:

The molecules in the medium, as they are forced to vibrate back and forth, generate heat. CONSEQUENTLY, a sound WAVE can only propagate through a LIMITED distance. In GENERAL, low frequency waves travel furtherthan high frequency waves because there is less energy transferred to the medium.

=Below 2 MHz radio WAVES follow the ground (ground wave propagation). LOWER frequencies ALSO require large ANTENNAS for EFFICIENT transmission and reception.✔✔

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Pressure is directly proportional to height density and ACCELERATION due to GRAVITY
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cutting tools have sharp edges so that it can EASILY CUT the vegetable or fruits. This is so because when the area is decreased the force applied is increased and when the area is increased the force applied is decreased.

I hope it HELPED you PLZ mark my answer as BRAINLIST if you find it helpful

HERE IS YOUR ANSWER

OPTION d is CORRECT

ANSWER:

(A) ACCELERATION DUE to GRAVITY

=Energy density is the AMOUNT of energy that can be stored in a GIVEN MASS of a substance or system.

1)Energy = Force × distance = (M× L×T^-2)×L = ML^2T^-2

2)Energy density = Energy/Volume,

3)Energy = (ML^2T^-2 ) ÷ L^3 = ML^-1T^-2.✔✔

=Words like “fact,” “theory,” and “LAW,” get thrown around a lot.In this fantastic video from the It’s OKAY To Be Smart YouTube channel, HOST Joe Hanson clears up some of the confusion surrounding four very important scientific TERMS: fact, hypothesis, theory, and law.✔✔

ANSWER:

yes

Explanation:

when ball is thrown up at highest POINT it's velocity is ZERO but acceleration is 9.8

=We can ignore the QUANTIZATION of electric CHARGE when DEALING with macroscopic charge because the charge on one electron is 1.6×10−19C in magnitude , which is very SMALL as compared to the large SCALE changes.✔✔

=FINDING Electric Field from Electric Potential: The component of E in any DIRECTION is the negative of the rate of change of the potential with distance in that direction: The symbol Ñ is called GRADIENT. Electric field is the gradient of electric potential.✔✔

=Microwave frequency usage is significant for the design of shipboard radar because it makes possible the DETECTION of smaller targets.Instead, DISTRIBUTED CIRCUIT elements and transmission-line theory are more USEFUL methods for design and analysis.✔✔

Answer:

School bags usually have broad STRAPS so that the weight of the bag may FALL over a LARGE area on the shoulder producing less pressure and less pressure, it is comfortable to carry HEAVY bag.

ANSWER:

a) 640m

b)20m/s

c)250m

Explanation:

a)s=ut+1/2at^2

s=0×8+1/2×20×8×8

s=640m

b)v^2-u^2=2as

v^2-0^2=2as

v^2=2as

v^2=2×20×10

v=√400

v=20m/s

c)again

s=ut+1/2at^2

s=0×5+1/2×20×5×5

s=250m

Answer:

motion means displacement or change in the POSITION of an object over time. It can be DESCRIBED in terms of displacement, distance, velocity ETC. eg PUSHING a block is an example of linear motion, opening a door is an example of rotation, rotating stone with attached thread is an example of a CIRCULAR motion.

SUSPENSION,COLLOID,TRUE SOLUTION