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ong>ANSWER:

don't know the CORRECT answer

Explanation:

so sorry I can't give you WRONG information

in cross PRODUCT i X i = 0

EXPLANATION:

jx j = 0

kxk= 0

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ong>ANSWER:

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CARBON forms TWO well-known oxides, carbon monoxide, CO, and carbon dioxide, CO2. In addition, it ALSO forms carbon suboxide, C3O2.

ong>ANSWER:

The MAGNITUDE of the force ACTING on the body is 10N

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True

Explanation:

Opposite POLES ATTRACTS each other

ong>ANSWER:

TUNE Study karni chahiye thi ab TEST me se COPY paste nahi karna PADTA

ong>Answer:

B) MASS it does on depend on DIRECTION

B) kinetic ENERGY ⚡⚡⚡⚡

calculate the number of MOLES in 2.24dm of NEON gas at stp

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ong>ANSWER:

viscous force due to LIQUID and GAS

ong>Answer:

you will be my defence minister we are GOING well for an Utkarsh PANDEY tq chhote bhai PLEASE line of the image formed by p

ong>Answer:

Biasing is the process of providing DC voltage which helps in the FUNCTIONING of the circuit. A transistor is based in order to make the emitter base junction forward biased and COLLECTOR base junction reverse biased, so that it maintains in ACTIVE region, to WORK as an amplifier

Explanation:

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ong>Answer:

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ong>Answer:

0.5 m s towards 3KG PLEASE FOLLOW

ong>ANSWER:

Heat from the higher BODY diffuses to the body with lower TEMPERATURE.

ong>ANSWER:

Five equal forces of 10N each are applied at ONE point and all are LYING one PLANE. If the ANGLES between them are equal, the resultant force will be. Solution : If the angle between all forces which are equal and lying in one plane are equal, then resultant force will be zero.

ETHYLALCOHOL is CORRECT

Value of UNIVERSAL GAS constant

Explanation:

8.31

0.73

10.73

1.98

ong>Answer:

in between

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That might not seem like much, until you consider how much DNA a cell has. In HUMANS , with our 6 BILLION base PAIRS in each diploid cell, that ...

The VALUE of universal CONSTANT is big

ong>Answer:

anyway from this, we know that the AXB VECTOR andBXA vectors are equal in magnitude but in OPPOSITE DIRECTIONS, I. e, they are ANTIPARALLEL, so the angle them is 180°or π rads

Explanation:

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Virtual IMAGES are always formed by convex MIRRORS and are formed by concave mirrors when the object is placed in front of F. ... Plane mirrors and convex mirrors will always produce an UPRIGHT image. A concave mirror will only produce an upright image if the object is located in front of the focal point.

Explanation:

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b) JOULE

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ong>Answer:

Faithful amplification can only occur on transistors with a forward biased emitter-base junction, a reverse biased collector-base junction, and proper ZERO signal collector CURRENT. Without the correct BIAS, the transistor will not operate EFFICIENTLY and cause its output to DISTORT.

ong>Answer:

In geiger-marsden scattering experiment , the trajectory traced by α- particle depends on. SOLUTION : Traajectory of α-particle depends on IMPACT parameter which is the perpendicular DISTANCE of the initial velocity VECTOR of the α particle from the centre of the nucleus.

Explanation:

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ong>ANSWER:

Friction

Friction is the FORCE that OPPOSES the relative motion or tendency of such motion of two surfaces in contact. It is also the contact of two objects creating STATIC electricity.

Explanation:

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ong>Explanation:

The junk shop was in.loridoer

b). Jim's letter was written in

c). The soldiers had schnapps and ......... in between the war.

d). Mrs. Macpherson SAID nothing but STROKED the letter ........... with her finger tips.

e)...............is the writer of "The BEST CHRISTMAS Present in the WORLD."

ong>Answer:

Potential DIFFERENCE FORMULA:** V = I X R** The potential difference (which is the same as voltage) is equal to the amount of current multiplied by the resistance. A potential difference of one Volt is equal to one Joule of energy being used by one Coulomb of CHARGE when it flows between two POINTS in a circuit.

ong>Answer:

Case-1

LET com be M(x,y).

x=

m+2m+3m+4m

m×0+2m×0+3m×l+4ml

=

10m

7ml

=

10

7

l

Similarly,

y=

10m

m×0+2m×l+3m×l+4m×0

=

10m

5ml

=

10

5

l

Case-2ABCD→BCDA

Let new POSITION of com is N(x,y)

x=

10m

2m×0+3m×0+4m×l+m×l

=

10m

5ml

=

10

5

l

y=

10m

2m×0+3m×l+4m×l+m×0

=

10m

7ml

=

10

7

l

Distance between M and N is

(

10

7

−

10

5

)

2

+(

10

5

−

10

7

)

2

l

2

=

⎝

⎛

(

10

2

)

2

+(

10

2

)

2

⎠

⎞

l

d=

10

2

2

l=

5

2

l

FORCE of friction which OPPOSES MOTION it is CONTACT force

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ong>Explanation:

In cricket, batting is the act or skill of hitting the ball with a bat to score runs or prevent the loss of one's wicket. Any player who is currently batting is denoted as a batsman, batswoman, or batter, REGARDLESS of WHETHER batting is their PARTICULAR area of expertise. Batting players have to adapt to various conditions when playing on DIFFERENT cricket pitches, especially in different countries - therefore, as well as having outstanding physical batting skills, top-level batters will have LIGHTNING reflexes, excellent decision-making and be good strategists.

The MOLAR volume, symbol VM, or. is the volume occupied divided by the amount of substance (of a chemical element or chemical compound) at a given temperature and pressure. It is equal to the molar MASS (M) divided by the mass density (ρ).

0.6 is answer because of error occurred in radius is 0.2 and VOLUME of sphere is PROPORTIONAL to cube of radius

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ong>Answer:

In the previous section of Lesson 1, the concept of electric potential was introduced. Electric potential is a location-dependent quantity that expresses the amount of potential energy per unit of charge at a specified location. When a Coulomb of charge (or any given amount of charge) possesses a relatively large quantity of potential energy at a given location, then that location is said to be a location of high electric potential. And similarly, if a Coulomb of charge (or any given amount of charge) possesses a relatively small quantity of potential energy at a given location, then that location is said to be a location of low electric potential. As we begin to apply our concepts of potential energy and electric potential to circuits, we will begin to refer to the difference in electric potential between two points. This part of Lesson 1 will be devoted to an understanding of electric potential difference and its application to the movement of charge in electric circuits.

Consider the task of moving a positive test charge within a uniform electric FIELD from location A to location B as shown in the diagram at the right. In moving the charge against the electric field from location A to location B, work will have to be done on the charge by an external force. The work done on the charge changes its potential energy to a higher value; and the amount of work that is done is equal to the change in the potential energy. As a result of this change in potential energy, there is also a difference in electric potential between locations A and B. This difference in electric potential is represented by the symbol ΔV and is formally referred to as the electric potential difference. By definition, the electric potential difference is the difference in electric potential (V) between the final and the initial location when work is done upon a charge to change its potential energy. In equation FORM, the electric potential difference is

The standard metric unit on electric potential difference is the VOLT, abbreviated V and named in honor of Alessandro Volta. One Volt is EQUIVALENT to one Joule per Coulomb. If the electric potential difference between two locations is 1 volt, then one Coulomb of charge will gain 1 joule of potential energy when moved between those two locations. If the electric potential difference between two locations is 3 volts, then one coulomb of charge will gain 3 joules of potential energy when moved between those two locations. And finally, if the electric potential difference between two locations is 12 volts, then one coulomb of charge will gain 12 joules of potential energy when moved between those two locations. Because electric potential difference is expressed in units of volts, it is sometimes referred to as the VOLTAGE.

a medium in which the speed of the LIGHT is more is KNOWN as the optically rarer medium and a medium in which the speed of the light is LESS is known as optically denser medium.

ong>Answer:

Refraction: The bending of light when it travels from one medium to another is known as Refraction. Normally, when a light travels from a denser medium to a rarer medium, the light changes its direction and moves away from the normal and while travelling from lighter medium to a denser medium it shifts its direction and moves closer to the normal.

Cause of Refraction: The main reason why the light changes its direction while travelling from one medium to another depends on the factor known as Refractive Index of the Material. As the refractive index is different for different medium, thus the speed of the light changes while travelling through them, resulting in the change of direction.

Optically Rarer and Denser Medium: A medium is said to be optically denser, when the speed of the light is more in that medium. Similarly when the speed of a light is less in a medium, it is said to be an optically rarer medium.

Laws of Refraction

(a) The incident ray, the refracted ray and the normal lies in the same plane.

(b) The sine of both the angles, that is, the angle of incidence to the angle of refraction is constant for the two media, the light is travelling through.

The refractive index of a medium can also be understood as the speed of the light in first medium through which the light is travelling to the speed of the light in the second medium, where the light GETS refracted. The refractive index of the air is 1.0003.

Refraction by Spherical Lenses

Lens: A lens consists of two transparent glass surfaces on the same side. The PORTION which is curved inwards is known as Concave Surface and the portion which is bulged outwards is known as Convex Surface. These two together form a lens.

Refraction by Spherical Lenses

Optical Centre and Principal Axis of a Lens

The central point of a lens is known as Optical centre of Lens. The line passing through the optical centre of the lens is known as Principal Axis. The principal axis is perpendicular to the both concave and convex surface of the lens.

Principal Focus and Focal Length of a Convex Lens: A parallel beam of lights after travelling parallel to the principal axis and passing through the convex surface, converges at a point on the principal axis. This point is known as the Principal Focus. Since a lens has two convex surfaces, thus a lens is said to have two foci. Both the foci of a lens are at equal distances from the optical centre. The word foci is the plural form of Focus .

Principal Focus and Focal length of a convex lens

Principal focus and focal length of a Concave Lens: Principal focus is defined as the point on principal axis from which the light travelling parallel to the principal axis, appears to diverge after passing through the concave lens.

Principal focus and focal length of a Concave Lens

The distance between optical centre and principal focus is known as Focal Length.

Image formation by Lens

In order to determine the nature, POSITION and size of an image FORMED by the spherical lenses, we need to know the basic rule of the image formation:

The basic rule are as follows:

A ray of light travelling parallel to the principal axis from the object after passing through the convex lens gets refracted and converges at the principal focus located on the other side of the lens. In case of concave lens, the ray of light after passing through the lens, DIVERGES from the principal focus.

In convex lens a ray of light after travelling through the principal focus, will travel parallel to the principal axis. In case of concave lens, the rays of light from the object appear to meet at the principal focus of the lens and then travels parallel to the principal axis.

When a ray of light from the object passes through the optical centre in both concave and convex lens, it will travel through straight without getting deviated.

The answer is a OPTION C

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