Explore topic-wise InterviewSolutions in .

Given that R = 2H

H = (H/2) TanθTanθ = 2

If Tanθ = 2 thenSinθ = 2 / √5Cosθ = 1 / √5

R = 2u² sinθ cosθ / g= (2u² × 2 / 5) / g= 4u² / (5 g)

Range of projectile is 4u² / (5g)

0ⁿ000000ⁿπ£703.61188118xy₹%

how sin is equal to √2/5 and cos is √1/5

well that is a separate mathematics question.

where trignomwtric formulas are used

since sinx= perpendicular/hypotenuse = 2/5

by applying pythagoras you can find that

for a traingle, using pythagorean theorem you can find that, for hypotenuse =5 and perpendicular = 2

base = 1

hence cosx = base/hypotenuse=> 1/5

how you find that hypotenuse is 5

Distance travelled by particle is area under the curve Divide figure into simple geometric figures and add their areas you will get answer.i.e. 20+10+10+10+5=55m

Kepler’s three laws of planetarymotioncan be stated as follows: (1) All planets move about theSuninellipticalorbits, having the Sun as one of the foci. (2) A radiusvectorjoining anyplanetto the Sun sweeps out equal areas in equal lengths of time. (3) The squares of the sidereal periods (of revolution) of the planets are directly proportional to the cubes of their mean distances from the Sun.

Kepler's three laws of planetary motioncan be stated as follows: (1) Allplanetsmove about the Sun in elliptical orbits, having the Sun as one of the foci. (2) A radius vector joining any planet to the Sun sweeps out equal areas in equal lengths of time.(3)Kepler's Third Law. “The square of the orbital period of a planet is proportional to the cube of the semi-major axis of its orbit” That'sKepler's third law. In other words, if you square the 'year' of each planet, and divide it by the cube of its distance to the Sun, you get the same number, for all planets.

hit like if you find it useful

Kepler’s Three Law:

Kepler’s Law of Orbits– The Planets move around the sun in elliptical orbits with the sun at one focus.

Kepler’s Law of Areas– The line joining a planet to the Sun sweeps out equal areas in equal interval of time.

Kepler’s Law of Periods– The square of the time period of the planet is directly proportional to the cube of the semimajor axis of its orbit.

Kepler's laws of planetary motionare threescientific lawsdescribing the motion ofplanetsaround theSun.Theorbitof a planet is anellipsewith the Sun at one of the twofoci.

A line segment joining a planet and the Sun sweeps out equal areas during equal intervals of time.

The square of theorbital periodof a planet is proportional to the cube of thesemi-major axisof its orbit.

The law of refraction, which is generally known as Snell's law governs the behave of light rays as they propagate across a sharp interface between two transparent dielectric media.

Laws of refraction states:1. The incident ray, the refracted ray and the normal to the interface of two media at the point of incidence all lie in the same plane.2. For the light of a given color and for given pair of media, the ratio of the sine of the angle of incidence to the sine of the angle of refraction is constant.

sin i/sin r = constant

1. The incident ray, the refracted ray and the normal to the interface of two media at the point of incidence all lie in the same plane.2. For thelightof a given color and for given pair of media, the ratio of the sine of the angle of incidence to the sine of the angle ofrefractionis constant.

Kirchhoff's law (1) states that the voltage changes around a closed path in a circuit add up to zero, where the voltage change DV = emf in going through a battery from - terminal to + terminal is considered to be positive, and the voltage change DV = I R in going through a resistor in the assumed direction of the current I is considered to be negative.Kirchhoff's law (2) states that the sum of the currents entering any node (i.e., any junction of wires) equals the sum of the currents leaving that node.

The law of thermal conductivity for isotropic solid states that the rate of heat flowing perpendicularly across a solid is directly proportional to the area of the cross section and temperature gradient of the solid.LetAbetheCSAofthesolid,LetthedifferenceoftemperaturebetweentwopointsseparatedbyadistanceΔx=T2−T1Thus,Qt∝A(T2−T1)/ΔxSinceheatflowsfromhotterareatocolderarea,soT1>T2,soT2−T1<0Sotokeeptherateofheatflowpositive:anegativesignisadopted.Qt∝−A(T2−T1)/Δx⇒Qt=−KA(ΔT/Δx)Kistheconstantofproportionalityknownascoefficientofthermalconductivity.

Hit like if you find it useful

pls tell me if my ans is right

16 + 12=28 is correct answer

28 is the correct answer of the given question

Well 4×4 = 16 + 4 = 20 + 8 = 28

Whenever we add something to zero it stays as it was. So answer is 28.

answer is 16+12+000=28

this process is water pyrolysis

Here we use first equation of motion, v=u+atat the highest point, final velocity, v would be zero.Initial velocity, u=14m/sa=-9.8 m/s ( negative sign as it acts downwards, opposite to the direction of velocity which here we have taken positive)so, 0= 14-9.8*ttherefore, 14=9.8tso, t=14÷9.8= 1.428 s= 1.43 s

MA>MB is right answer

This the correct answer MA =MB

answer this question is c

Please like the solution 👍 ✔️

The drift velocity is the average velocity that a particle, such as an electron, attains in a material due to an electric field. It can also be referred to as axial drift velocity. In general, an electron will propagate randomly in a conductor at the Fermi velocity.

The average velocity attained by some particle such as an electron due to the influence of an electric field is termed as the drift velocity.

Drift velocity is defined as the average velocity with the free electrons get drifted towards the positive end of the conductor under the influence of an external electric field appliedE =V/l

F= -e E

a = -eE/mv1 =u1+a.t1 (t1=time elapsed)similarlyv2. v3. v3...vndrift velocity = -eE t/m

Drift velocity is the average velocity that a particle such as electron attains in a material due to electric field.

Current is directly proportional to Drift velocity ,which in a resistive material is, in turn, proportional to the magnitude of an external electric field. So Ohm’s equation can be written as;

u=n*E

where u=Drift velocity

n=Mobility

E=Mobility

So it depends upon Mobility and Mobility.

The formula for evaluating the drift velocity of charge carriers in a material of constantcross-sectionalarea is given by

u=j/n*q

j=current density

n=Charge carrier number density

q=Charge on the charge carrier

Above given factors also affect the drift velocity.

The value of g will be high at the Goa beach because of the Inverse Square Law. The Goa beach is at lower height as compared to the top of Mount Everest.

The direction of drift velocity of conduction electrons is opposite to the electric field.

Psubscribe shyam Bhardwaj Vlogs on YouTube

conductor

A wire having very high value of conductance is said to be a very good Conductor.

Answer:A) ConductorExplanation Conductancerefers to the property of a material which measures how easily current is able to pass through it. It is equal to the inverse of resistance. Conclusively, if theconductanceof a material is high, it is aconductor.

A wire having very high value of conductance is said to be a very good (A) ___conductor.

a) is the correct answer

The more the deviation from incident ray, the more is the optical density of the medium and less will be the speed.

So the velocity will be maximum in C as deviation is minimum.

Thanks..

force balance eq for 10kg

10*g -t2 = 0=> t2 = 10*10 = 100N

and for 5kg5*g+t2-t1 = 0 => 50+100=t1

so t1 = 150N

Yes,the velocity of light is different in different media.

true velocity of light is different in different media.

(1)the fuse should always be considered in neutral wire

always fuse connected in phase wire or live wire

all the swiyches should be connected in live wire

The earth is colouredgreen oryellow.

Acopper wirecannot be used as afuse wire becauseit has a high melting point. It willnotmelt easily when a high electric current passes through it andmaydamagetheelectrical appliances. Theresulting damage is going to be a lot more expensive than areplacement fusewould be.

thanx

Afuseis nothing more than a short length ofwiredesigned to melt and separate in the event of excessive current.Fusesare alwaysconnectedin series with the component(s) to be protected from overcurrent, so that when thefuseblows (opens) it will open the entire circuit and stop current through the component(s).

V=IR =6×40 I=6A R=40ohms V=? =240V

thanks

Althoughvolumeis not a baseunitin the SI system, there is a derivedunitofvolumein the metric (or SI) system: m³. The mostwidelysoldmatchboxis: 0.05 m x 0.035 m x 0.015 m in size which makes it'svolume: 0.00002625 m³

option no. 3rd is correct

option 2 is the correct answer

A mirror doesn't reverse left to right either as you will see with an asymmetric object. Imagine the mirror is one of those impression taking toys that had a dense number of pins in which are pushed back on contact and retain the 3D shape. The illusion is, because we are roughly symmetrical, that there has been a left/right inversion. The reality is your right side is on the right side of the image.

Thank you 💐👌

Volume of block = VVolume of water displaced = V - 2V/5 = 3V/5 = 0.6VDensity of wood (d) = 0.78 × 1 g/cm³ = 0.78 g/cm³Density of glycerine = d’

Weight of block = Buoyant ForceVdg = 0.6Vd’gd’ = d / 0.6d’ = 0.78 g/cm³ / 0.6d’ = 1.3 g/cm³

Relative density of glycerine = 1.3 g/cm³ / (1 g/cm³)= 1.3

Relative density of glycerine is 1.3

Like my answer if you find it useful!

scattering effect of light Tyndall effect

As in the case of the refraction oflightthrough prisms with nonparallel sides, the refraction oflightat two boundaries of the droplet results in thedispersion of lightinto a spectrum of colors. The shorter wavelength blue and violetlightrefract a slightly greater amount than the longer wavelength redlight.Aclear cloudlessday-time sky is blue because molecules in the air scatter bluelightfrom the sun more than they scatterred light. When we look towards the sun at sunset, we seeredandorangecolours because the bluelighthas been scattered out and away from the line of sightArainbowis a meteorological phenomenon that is caused by reflection, refraction and dispersion of light in water droplets resulting in a spectrum of light appearing in the sky. It takes theformof a multicoloured circular arc.Rainbowscaused by sunlight always appear in the section of sky directly opposite the sun.

Si unit of charge is coulomb.One coulomb is the amount of charge given by an ampere per second

if my answer is helpful please like it

let x = (0.0076)1/5log x= log (0.0076)1/5=1/5 log ( 0.0076)

bar= 1/5 ( 3.8808)bar= 1.5762then antilogx= 0.3769...