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It does not matter how high an athlete jumps in a long jump. The span of long jump depends upon the initial velocity and the angle at which an athlete jumps. The span of jump is maximum for an angle of 45°.

Answer is wrong

Since the parrot and the train are moving in the opposite direction

therefore parrot's relative velocity will be 5m/s + 10 m/s =15m/s

distance=speed*time

so 150=15*t

t=150/15 =10 sec

If the charge is undeflected, then the magnetic force equals the electric force:

q*v*B =q*E

B is the magnitude of the magnetic field

E is the magnitude of the electric field

v is the magnitude of the velocity of the particle.

If the forces are equal then:

v =E/B

m = 200 kg, R = 20 m, Angle of banking =ФSpeed = v =10 m/s.

Let f be the friction force and N be the normal force from the ground. When the banking of road is done for speed v, it means that the normal force supplies the centripetal force. Friction plays no part. If the speed is either less or more than v, then it comes into play.

Centripetal force =N sinФ = m v²/RAlso, N Cos Ф = mg=> TanФ = v²/gR = 10²/(10*20) = 1/2 cosФ = 2/√5 SinФ = 1/√5 N = mg SecФ = 200*10*√5/2 = 1000√5 Newtons

When the vehicle is moving at 5 m/s less than the optimum speed,the centripetal force required is less. But the normal reaction force N is same.Hence, a friction force f acts upwards (towards outside of the curved road) the incline.

So N CosФ + f sinФ = m g => N (CosΦ + μ sinΦ) = m g N sinФ - f cosФ = m u²/R => N (sinΦ -μ CosΦ) = m u²/R=> (CosФ +μ SinΦ) * u²/gR = (sinФ -μ CosΦ)=> μ [sinΦ *u²/gR + cosФ] = [ sinФ - CosФ * u²/gR ]=> μ = [sinΦ - cosΦ * u²/gR] / [sinФ * u²/gR + cosФ]

=> μ = [1/√5 - 2/√5 * 5²/(10*20)] / [1/√5 * 5²/(10*20) + 2/√5] = [ 3/(4√5) ] / [ 17/(8√5) ] = 6/17

Normal force N = mg/[CosΦ +μ SinΦ] = 200*10/ [2/√5 + 6/17 * 1/√5] = 850√5 NFriction force = f = μ N = 300√5 N upwards the slope.

answer will be exactly 64.8m/ s

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The total length of two trains = 120 m + 130 m = 250 m

The two trains will cover a distance of 250 m to totally cross each other.

The speed of the two trains in this problem must be added together.

VAB = VA + VB

VAB = 20 m/s + 30 m/s = 50 m/s

The total time = total distance / total speed

The total time = 250 m / 50 m/s = 5.0 seconds

The two trains will totally cross each other after 5.0 seconds.

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Given that of a rocket sledge,mass (m) = 300 kgInitial velocity (u) = 0Final velocity (v) = 1500 km/hTime taken (t) = 2.4 sForce (F) = ?

Value of v in SI system is 1500 X5/18= 416.67 m/s

F = ma = m(v-u)/t = 300(416.67-0)/2.4 = 52983.75 newton = 5.21 X 10^4 N (Ans)

The shorter line in the symbol of electric cell represents negative terminal.

Here arc length; Cs =44 cmRadius of a circle; r = 17.5 cmSo, area of sector = Cs/2πr×πr2

=44/2π×17.5×π×(17.5)(17.5)=22×17.5=385 cm sq.

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C = 2 π x 17•5 cm = 109•9 cm109•9 cm ____360⁰44 cm_____[44/109•9 ] x 360⁰ = 144•1⁰Angle at centre of arc = 144•1⁰

Area of circle = π x 17•5² cm² = 962•1 cm²

Area of sector = [ 144•1⁰ / 360⁰] x 962•1 cm²Area of sector = 385•1 cm²

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Newton's Second law of motion :- The rate of change of momentum is directly proportional to the force applied on the system.Force applied is directly proportional to the product of mass and acceleration .

Newton's second lawof motion is F = ma, orforceis equal to mass times acceleration. Learn how to use theformulato calculate acceleration. Created by Sal Khan.

newtons 2nd law states that.. the rate of change inomentum is directly proportional to the force applied on the system and the force applied is directly proportional to the product of acceleration and mass

the second law of motion :- The rate of change of momentum is directly proportional to the force applied on the system

f=m×a is the law of Newton

The Newton's law of gravitation states that every point mass attracts every other point mass by a force acting along the line intersecting the two points. The force is proportional to the product of the two masses, and inversely proportional to the square of the distance between them.

The equation for universal gravitation thus takes the form: F = G m1m2/r^2

where F is the gravitational force acting between two objects, m1 and m2 are the masses of the objects, r is the distance between the centers of their masses, and G is the gravitational constant.

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In physics and chemistry, the law of conservation of energy states that the total energy of an isolated system remains constant; it is said to be conserved over time. This law means that energy can neither be created nor destroyed; rather, it can only be transformed or transferred from one form to another.

Kepler’s three laws of planetary motion can be stated as follows: (1) All planets move 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) The squares of the sidereal periods (of revolution) of the planets are directly proportional to the cubes of their mean distances from the SunNewton's law of universal gravitation states that every particle attracts every other particle in the universe with a force which is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers.

Since the parrot and the train are moving in the opposite direction

therefore parrot's relative velocity will be 5m/s + 10 m/s =15m/s

distance=speed*time

so 150=15*t

t=150/15 =10 sec

Ans :- Sunrise fromWest setsinEastin case ofVenus.Venusspins in the opposite direction from most other planets, including Earth, so that onVenus the sun risesin thewest. Strong Atmospheric tides fromthe sunmade it Flip 180 degrees. Tidal effects of other planets also made it to spin opposite wrt to earth.

let the initial velocity towards north be 20j

so, the final velocity towards south be -20j

then change in Velocity will be -20j-20j = -40j

-ve sign is due to the fact that, direction is reversed to south from North.. and north is assumed to be +ve here.

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2)Yes,two ballshavingsamekind ofcharge can attract each other, if oneballpossesseschargequite large as compared to that onthe other ball.Thereason is that whentwo charged ballsare placed neareach other, they induce opposite kinds ofchargesonthefaces ofeach other.

Gravity is the force that attracts two bodies toward each other, the force that causes apples to fall toward the ground and the planets to orbit the sun. The more massive an object is, the stronger its gravitational pull.

it is its naturalaty

Plastic comb gets electrically charged due to rubbing & therefore it attracts tiny pieces of paper. A charged body can attract anuncharged body.

Types of employment

Full-time and part-time employees.

Casual employees.

Fixed term and contract.

Apprentices and trainees.

Commission and piece rate employees.

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Different types of motion of the object gives rise to different types of friction.Generally there are 4 types of friction they are Static friction, Sliding friction, Rolling friction, Fluid friction. STATIC FRICTION

Static friction exists between a stationary object and the surface on which it is resting.It prevents an object from moving against the surface.

Examples: static friction prevents an object like a book falling from the desk even if the desk is slightly tilted, it helps us pick up an object without slipping through our fingers.

When we want to move an object first we must overcome the static friction acting between the object and the surface on which the object is rest.

SLIDING FRICTION

Sliding friction occurs between objects as they slide against each other.

When sliding friction is acting there must be another force existing to keep the body moving.

ROLLING FRICTION

Rolling friction is the resistive force that slows down the motion of a rolling ball or wheel. It is also called rolling resistance.

When a force or torque is applied to a stationary wheel, there is a small static rolling friction force holding back the rolling motion. However, resistance from static sliding friction is what really causes the wheel to start rolling. Rolling friction hinders the motion of an object rolling on a surface, that means it slows down the motion of an object rolling on a surface.

There are fourtypes of friction: static, sliding, rolling, and fluidfriction.

full framesrimmed frames and semi rimmed frames

FrameStructures -Types of FrameStructures.Framestructures are the structures having the combination of beam, column and slab to resist the lateral and gravity loads.

Hooke's law,law of elasticitydiscovered by the English scientist RobertHookein 1660, which statesthat, for relatively small deformations of an object, the displacement or size of the deformation is directly proportional to the deforming force or load.

Depending upon the nature of force applied on the body, themodulus of the elasticity is classified in the following three types:

1. Young’s Modulus of Elasticity (Y)

When a wire is acted upon by two equal and opposite forces in the direction of itslength, the length of the body is changed. The change in length per unit length (Δl/l) is called the longitudinal strain and the restoring force (which is equal to the applied force in equilibrium) per unit area of cross-section of wire is called the longitudinal stress.

Three types of neutrinos are known.The table below lists the known types of neutrinos (and their electrically charged partners).

Neutrino : ne nm ntCharged Partner : electron (e)

Neutrino : nm Charged Partner : muon(m)

Neutrino : ntCharged Partner : tau (t)

M = H2= -V/U = 1/2 = -V = U/2 V = -4/2 1/V + 1/U = 1/F 1/-U/2 + 1/U = 1/18-2/U + 1/U = 1/18-U/U = 1/18U = -18U = 18cm

Distance covered in nth second = u + 1/2a(2t - 1 )

this will give the time in which the two stones reached the ground

putting that value of 't' in distance = ut + 1/2 at^2

we will get the height of both the towers dividing both heights we will get the ratio which is your answer 25:49

Adiabatic coolingis the process of reducing heat through a change in air pressure caused by volume expansion. In data centers and other facilities,adiabaticprocesses have enabled freecoolingmethods, which use freely available natural phenomena to regulate temperature.

Theuniverseis the vast unimaginable space composing manyheavenly bodiessuch as, planets, stars, sun, constellations, comets, meteors etc.