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re two laws of reflection1. The angle of incidence is always EQUAL to the angle of reflection.2. The incident ray, the normal(at the POINT of incidence) and the REFLECTED ray all lie in the same place.Hope it will HELP youplease mark my answer as BRAINLIEST.

al DISTANCE is X m then in first half(X/2) SPEED is 40km/hr(40×5/18= 100/9m/sec) then let time in for this half is t1= X/2/100/9. , and ANOTHER next half( X/2) speed is 20km/h(20×5/18=50/9m/sec) and for another half time is t2 =X/2/50/9 then av.speed = total distance/t1+t2 , av. speed=X/(X/2/100/9)+(X/2/50/9) then X is CANCELLED out then , av. speed= 1/(9/200)+(9/100)av. speed= 1/(9+18/200), av. speed= 200/27 m/sec , 200/27×18/5= 26.67km/hr

tion:|X| = 20 , |y| = 25because [MATH]o \LEQ ||x| - |y|| \leq | x - y| \leq |x + y| \leq |x| + |y|[/math]we only KNOW the magnitude no DIRECTION then it can bebetween [math]|20 - 25| = 5 \leq 45 = 20 + 25[/math]

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plzzz FOLLOW me and mark it as brainliest...Explanation:The principle focus of concave mirror is a point on its principle axis to which all the light rays which are parallel and close to the axis, converge after reflection from the mirror. Uses of convex MIRRORS:1) Convex mirrors are used in REAR VIEW mirror in VEHICLES because the mirror can diverge a beam of light and create a virtual image.2) Convex mirrors are used as reflectors in street lamps to diverge light over a larger area.

tion:hope. it's HELP youthis is the second law of REFLECTION

tion:(a)FRACTIONAL distillation is used to separate a mixture of two or more miscible liquids for which the DIFFERENCE in boiling point is less than 25 K. b/fractional distillation is used in oil refineries to separate crude oil into useful substances (or fractions) having DIFFERENT hydrocarbons of different boiling points. The crude oil fractions with higher boiling points: have more carbon atoms.hope this helpsplz MARK as brainliest

be the third part...but I'm not completely sure, PLZ check with OTHERS before you SELECT the third....I'm not very GOOD at maths

its INTERNAL ENERGY DECREASES by 40 J.

car covers 1/3rd of total DISTANCE with v₁=10 km /hr,second 1/3rd part with v₂=20 km/hr and rest 1/3rd part with v₃=60 km/hr. Let total distance is 3 X. The TIME is equal to the distance divided by speed. HENCE, The average speed of the car is 16.36 km/h.

1gf CM is EQUAL to 980.66 DYNE cm

tion:What is Refraction?Refraction is the bending of a WAVE when it enters a medium where its speed is different. We can define it as:Refraction is the change in direction of a wave passing from one medium to another or from a gradual change in the mediumRefraction of light is one of the most usually observed phenomena which includes refraction of light through prism, but other waves like SOUND waves and water waves also experience refraction.Laws of Refraction of LightLaws of refraction state that:The INCIDENT ray, refracted ray, and the normal to the interface of two media at the point of incidence all lie on the same plane.The ratio of sine of angle of incidence to the sine of angle of refraction is a constant. This is also known as Snell’s law of refraction.sinisinr=constantCauses of RefractionThe cause of refraction of light is as follows:The frequency of the refracted ray remains constant.Due to partial reflection and absorption of light at the interface, the intensity of the refracted ray will be less than the incident ray.When the light crosses the boundary between two different media, deviation of light OCCURS resulting in refraction such that there is a change in wavelength and speed of light.Effects of RefractionTwinkling of stars is due to refraction of light.Mirage and looming are optical illusions which are a result of refraction of light.A swimming pool always looks shallower than it really is because the light coming from the bottom of the pool bends at the surface due to refraction of light.Refraction ExamplesFormation of a rainbow is an example of refraction as the sun rays bend through the raindrops resulting in rainbow.Prism is also an example of refraction.Related Article:Reflection of Light6,23,974What is Refraction of Light in Ray Optics?Refraction of light refers to the change in direction of a ray of light when it travels from one medium to another. Refraction of light is one of the most common types of phenomenon but various other waves like water waves and sound waves also experience refraction.Example:For example, the FIGURE below shows a ray of light travelling from a medium of air to that of water.Refraction of LightRay of light travelling from air to waterHave u ever soaked your legs in a bucket?You would have noticed that your legs looked slightly deformed and kind of shorter. The phase velocity of travelling light rays are altered when they travel from one medium to another of a different refractive index.What is Refractive Index?Refractive index also called the index of refraction describes how fast light travels through the material.Refractive Index is dimensionless. For a given material, the refractive index is the ratio between the speed of light in a vacuum (c) and the speed of light in the medium (v). If the refractive index for a medium is represented by n, then it is given by the following formula: n=cvBased on the refractive index of the medium, the light ray changes its direction, or it bends at the junction separating the two media. If the light ray travels from a medium to another of a higher refractive index, it bends towards the normal, else it bends away from the normal.Applications of Refraction of LightRefraction has many applications in optics and technology. Depending on the type of spherical lens used (convex or concave) refraction through glass has many uses.A lens uses refraction to form an image of an object for various purposes, such as magnification.Passing white light through a glass prism can split the white light into the spectrum of colour (VIBGYOR).In nature, it is refraction that causes us to see a different phenomenon like mirages and also the twinkling of stars… which is caused due to the atmospheric refraction of light.

MEANING IN HINDI:-an image that you SEE in a mirror, in water or on a shiny surfaceMEANING IN HINDI:-(दर्पण, जल या किसी चमकदार सतह पर दिखने वाला) प्रतिबिंबEXAMPLE:-He ADMIRED his reflection in the mirror.MARK AS BRAINIST ,THANK ,RATE AND FOLLOW.GOD WILL BLESS YOU

Density of a SUBSTANCE is its mass per VOLUME. It's S.I. UNIT is kg/meter CUBE.

M(original) = mvNew mass = 7M and new velocity = v/5therefore M(new) = 7m*v/5 = 7/5 mvratio of M (new) : M (original) = 7/5mv : MV= 7/5 : 1= 7 : 5

In the following reaction oxidation number of S increases from -2 in H2S to 0 in S so due to increase in oxidation number H2S oxidised to S. Explanation:I HOPE THIS HELPS U.

4m/s ANSWER is rightExplanation:s=d/ts=200/50s=4 m/s

here is your answer, grab itExplanation: blood is composed of different cells and materialsLike-red blood cells( RBCs)white blood cells (WBCs)platelets it ALSO contains carbon DIOXIDE and oxygen INCLUDING glucose and other waste materialsblood is separated by the PROCESS ofblood fractionatin using CENTRIFUGATION.

concave lens myopia (short SIGHTEDNESS) correction. USE in terestial telescope use of convex lens use in hyper meteropia(LONG short-sightedness) correction. use in MAGNIFYING lens use in CAMERA .

the flow of CURRENT will ALWAYS be from negative to POSITIVE in any situation but in diagram it's illustrated from positive to negetive.

tion:The magnetic force on a moving charge is one of the most fundamental known. Magnetic force is as important as the electrostatic or Coulomb force. Yet the magnetic force is more complex, in both the number of factors that affects it and in its direction, than the relatively simple Coulomb force. The magnitude of the magnetic force F on a charge q moving at a speed v in a magnetic field of strength B is given byF = qvB sin θ,where θ is the angle between the directions of v and B. This force is often called the Lorentz force. In fact, this is how we define the magnetic field strength B—in terms of the force on a charged particle moving in a magnetic field. The SI unit for magnetic field strength B is called the tesla (T) after the eccentric but brilliant inventor Nikola Tesla (1856–1943). To determine how the tesla relates to other SI units, we solve F = qvB sin θ for B.B=FqvsinθBecause sin θ is unitless, the tesla is1 T=1 N C⋅ m/s=1 NA⋅ m(note that C/s = A). Another smaller unit, called the gauss (G), where 1 G = 10−4 T, is sometimes used. The strongest permanent magnets have fields NEAR 2 T; superconducting electromagnets may attain 10 T or more. The EARTH’s magnetic field on its surface is only about 5 × 10−5 T, or 0.5 G.The direction of the magnetic force F is PERPENDICULAR to the plane formed by v and B, as determined by the right hand rule 1 (or RHR-1), which is illustrated in Figure 1. RHR-1 states that, to determine the direction of the magnetic force on a positive moving charge, you point the thumb of the right hand in the direction of v, the fingers in the direction of B, and a perpendicular to the palm points in the direction of F. One WAY to remember this is that there is one velocity, and so the thumb represents it. There are many field lines, and so the fingers represent them. The force is in the direction you WOULD push with your palm. The force on a negative charge is in exactly the opposite direction to that on a positive charge.plzzz mark me brainlist

nt time measuring devicesCandle ClocksIt consisted of six CANDLES made from 72 pennyweights of wax, each 12 inches (30 cm) high, and of uniform thickness, marked every inch (2.54 cm). As these candles burned for about four hours, each mark represented 20 minutes.Incense ClocksThey burned evenly and without a flame; therefore, they were more accurate and safer for indoor use.SundialsEvery day was divided into 12 equal segments regardless of the time of year; thus, hours were shorter in winter and longer in summer.HourglassIt was ONE of the few reliable methods of measuring time at sea, it is speculated that it was used on board ships as far back as the 11th century, when it would have complemented the magnetic compass as an aid to navigation.Clock TowersClock TOWERS in Western Europe in the Middle Ages were also sometimes striking clocks.Astronomical ClocksIt incorporated an escapement mechanism as well as the earliest known endless power-transmitting chain drive, which drove the ARMILLARY sphere.Wrist watchesWrist watches were first worn by military men towards the END of the nineteenth century, when the importance of synchronizing manoeuvres during war without potentially revealing the plan to the enemy through signalling was increasingly recognized.

An ORDER of magnitude is an EXPONENTIAL change of plus-or-minus 1 in the value of a quantity or unit. ... As values get smaller, a decrease of ONE order of magnitude is the same as multiplying a quantity by 0.1. A decrease of two ORDERS of magnitude is the equivalent of multiplying by 0.01, or 10-2.

don't no the ANSWER EXPLANATION:FOLLOW me

You probably know that the Earth pulls down on you. What you might not realize is that you are also pulling up on the Earth. For example, if the Earth is pulling down on you with a gravitational force of 500 N, you are also pulling up on the Earth with a gravitational force of 500 N. This remarkable fact is a consequence of Newton's third law.Newton's third law: If an object A exerts a force on object B, then object B must exert a force of equal magnitude and opposite direction back on object A.This law represents a certain symmetry in nature: forces ALWAYS occur in pairs, and one body cannot exert a force on another without experiencing a force itself. We sometimes refer to this law loosely as action-reaction, where the force exerted is the action and the force experienced as a consequence is the reaction.We can readily SEE Newton’s third law at work by taking a look at how people move about. Consider a swimmer pushing off from the side of a pool, as illustrated below.A swimmer pushes on the wall with her feet, which causes the wall to push back on her feet due to Newton's third law. Image credit: Adapted from Openstax College PhysicsThe swimmer pushes against the pool wall with her feet and accelerates in the direction opposite to that of her push. The wall has exerted an equal and opposite force back on the swimmer. You might think that two equal and opposite forces would cancel, but they do not because they act on different systems. In this case, there are two systems that we could INVESTIGATE: the swimmer or the wall. If we select the swimmer to be the system of interest, as in the image below, then Fwall on feetF_{\text{wall on feet}}Fwall on feet​F, start subscript, start text, w, a, l, l, space, o, n, space, f, e, e, t, end text, end subscript is an external force on this system and affects its motion. The swimmer moves in the direction of Fwall on feetF_{\text{wall on feet}}Fwall on feet​F, start subscript, start text, w, a, l, l, space, o, n, space, f, e, e, t, end text, end subscript. In contrast, the force Ffeet on wallF_{\text{feet on wall}}Ffeet on wall​F, start subscript, start text, f, e, e, t, space, o, n, space, w, a, l, l, end text, end subscript acts on the wall and not on our system of interest. Thus Ffeet on wallF_{\text{feet on wall}}Ffeet on wall​F, start subscript, start text, f, e, e, t, space, o, n, space, w, a, l, l, end text, end subscript does not directly AFFECT the motion of the system and does not cancel Fwall on feetF_{\text{wall on feet}}Fwall on feet​F, start subscript, start text, w, a, l, l, space, o, n, space, f, e, e, t, end text, end subscript. Note that the swimmer pushes in the direction opposite to that in which she wishes to move. The reaction to her push is thus in the desired direction.Other examples of Newton’s third law are easy to find. As a professor paces in front of a whiteboard, she exerts a force backward on the floor. The floor exerts a reaction force forward on the professor that causes her to accelerate forward.Similarly, a car accelerates because the ground pushes forward on the drive wheels in reaction to the drive wheels pushing backward on the ground. You can see evidence of the wheels pushing backward when tires spin on a gravel road and throw rocks backward.In another example, rockets move forward by expelling gas backward at high velocity. This MEANS the rocket exerts a large backward force on the gas in the rocket combustion chamber, and the gas therefore exerts a large reaction force forward on the rocket. This reaction force is called thrust. It is a common misconception that rockets propel themselves by pushing on the ground or on the air behind them. They actually work better in a vacuum, where they can more readily expel the exhaust gases.Helicopters similarly create lift by pushing air down, thereby experiencing an upward reaction force. Birds and airplanes also fly by exerting force on air in a direction opposite to that of whatever force they need. For example, the wings of a bird force air downward and backward in order to get lift and forward motion. Explanation:Being honest with you,Actually it is from any other website.Actually i don't know how to give the link so i did this.HOPE IT HELPED YOU :)      :P.

m=20v=12P=m×v 20×12 240 if it HELPS pls thank me and MARK me as BRAINLIEST

tion: Calculate the amount of external EQUITIES as on 31st March ' 2015:AMIT started a business with a capital of ` 20,000 on 1st April,2014.On the same day, he also BORROWED ` 5,000 from a friend to invest in business. During 2014-15, he earned a profit of ` 10,000, introduced an additional capital of ` 12,000 and had withdrawn ` 6,000 for his personal USE. One 31st March, 2015, the total ASSETS were ` 1,00,000.

The FORMULA for SPEED is speed = DISTANCE ÷ time.Explanation:

That is wrongSpring acquire ENERGY during COMPRESSION,and that energy is POTENTIAL ENERGY,and its is stored in it when it is released the POTENTIAL ENERGY is converted in KINETIC ENERGY Explanation:

OPTION (2) is CORRECTEXPLANATION:We USE the CONCEPT of PATH DIFFERENCE and the relation of PD for a minimaRefer the attachement for detailed solution!Hope this answer helped you ✌

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eteExplanation:DIAGRAM PLEASE

In the INDUCTION PROCESS, a charged object is brought near but not touched to a neutral conducting object. The presence of a charged object near a neutral conductor will force (or induce) electrons WITHIN the conductor to move. ... The flow of electrons results in a permanent CHARGE being left upon the object.

It HELPS in making of Atta DOUGH,in washing clothes,in making AAM CHUTNEY, hope it helps you plz

I don't KNOW FUSE ASK any OTHERS

Tatal distance is equal to circumference=2πrhence TOTAL distance covered in first round is 2*22/7*20by using speed=distance/ timeu can FIND speedand then you have to find distance for THREE minutes and hence DISPLACEMENT is zeroyou can do like this

Heat MEASURE KINETIC energy and potential energy contains by MOLECULES in an object and temperature measure the average kinatic energyof molecules insubstanCE hope it helps you plz MAKE it a BRAINLIST answer plzzExplanation: ।

is required to compress a SPRING; the more COMPRESSION there is, the more force that is required to compress it further. Spring constant (k). If a spring is not stretched or compressed, then no work was DONE by an outside force (Fapplied) therefore it will not have gained or LOST any mechanical energy.

see the attachment given below HOPE U GET it mate.......