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Answer:

CHARGE is a basic property of MATTER. ... According to Coulomb, the electric force for charges at rest has the following properties: Like charges repel each other; unlike charges attract. Thus, two negative charges repel one ANOTHER, while a POSITIVE charge ATTRACTS a negative charge.

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Explanation:

IDK. CAN U GIVE QUE. IN MORE DETAIL.

Answer:

Ask full question and TELL what you WANT in that question.

Friction is a necessary evil because it has both advantages and disadvantages.

Here are some of them...

Friction is necessity

(1) It is DUE to friction between the ground and the feet that we are able to walk.

(2) The brakes of a vehicle cannot work without friction.

(3) Various parts of a machine are able to rotate because of friction between belt and pulley.

(4) The tyres of vehicles are made rough to increase friction.

(5) Nails and screws join various wooden parts due to friction.

(6) In the absence of friction it will not be possible to write on paper with a pen or pencil.

Friction is an evil:

(1) Wear and tear of machinery is due to friction.

(2) A large amount of power is wasted in overcoming friction and the efficiency of the machines DECREASE considerably.

(3) Excessive friction between ROTATING parts of a machine producers enough heat and causes damage to the machinery.

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Brainly Stars.

Answer

At sunrise and sunset, the sun is near the horizon. The rays of light from the upper part and lower part of the periphery of the sun BEND UNEQUALLY on TRAVELLING through earth's atmosphere. That is why the sun appears oval or flattened at the time of sunrise and sunset.At NOON, the sun is overhead. The rays of light from the sun enter earth's atmosphere normally. Therefore, they suffer no refraction or bending on passing through earth's atmosphere. Hence the sun appears CIRCULAR at noon.

Answer:

When a given MASS of a solid or LIQUID is heated its volume increases. ACCORDINGLY the density of a solid or a liquid decreases on HEATING. With INCREASE in temperature, volume increases,so density decreases and vise_versa.

ANSWER:

The physical quantity which has DIMENSIONAL formula as that of Energy/mass x LENGTH is. Force. POWER.

P=1/

P∝1/√m

P1/P2=

P1/P2=4/1

D 2:1 is the ANSWER to QUESTION

Given:

A boy of mass 30kg is running with a velocity 3 m/s on the ground just tangential to the merry go round which is at rest.it had radius 2m,mass 120kgants radius of gyration is 1m.

To FIND:

Angular velocity acquired by the SYSTEM when boy JUMPS on the merry-go round.

Calculation:

In this type of questions , we need to apply the concept of conservation of angular momentum since no is External Torque is involved.

Let mass of boy be m and mass of merry-go-round be M ; K denotes radius of gyration.

Putting available VALUES in SI unit:

So, final answer is:

ANSWER:

hj468434543567yfxvkjgx xsdujk

ANSWER:

[email PROTECTED]₩&'hwel#£*#*kzjsyfirioe

54km/hr= 15m/s

18km/hr= 5m/s

A=15-5/5

A=5m/s²

V²=U²+2as

225-25/10

S=200/10

S=20m

vy=0 at HIGHEST POINT or at MAX HEIGHT

ANSWER:

The three DIVISION of STONE age are ANCIENT period ,medieval period and modern period.

Answer:

This is also the speed at which they are MOVING TOWARDS each other or the speed at ... Thus, the distance covered in 3 min = (10 x 3 x 60) = 1,800 m . ... We KNOW that S X T = D, But now his speed is 3/ 4 ...

Answer:

The focus where the parallel LIGHT rays coming from a FAR object, parallel to each other and to principle axis converge actually is called real focus and when it DIVERGE but appears to converge if rays are extended back is called virtual focus.

ANSWER:

no answer because I doesn't UNDERSTAND this TYPE of QUESTIONS SORRY

Answer: SPEED * TIME

Explanation:

SPEED = DISTANCE/ TIME (DISPLACEMENT = SHORTEST DISTANCE)

NOW,

DISPLACEMENT = SPEED * TIME.

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Acceleration and displacement are related as a = x²

we KNOW, acceleration , a =

so, x² =

⇒x²dx = vdv

⇒∫x²dx = ∫vdv

at X = 0 , body is in rest ∴ initial velocity , v₀ = 0

Let velocity at x = 2 is v

Now,

⇒ [x³/3]²₀ =

⇒8/3 = v²/2

⇒16/3 = v²

So, v = ±4/√3 m/s

Hence, MAGNITUDE of velocity = 4/√3 m/s

ANSWER:

n/Vavg= 1/v1+1/v2+1/v3

Explanation:

If a PARTICLE COVERS n-equal distances with VELOCITY v1,v2......hn.

Then Vavg,

n/Vavg= 1/v1+1/v2+........+n/vn

Answer:

It will become 1/9th of the of the previous

Explanation:

Force is INVERSELY PROPORTIONAL to the square of distance between TWO objects if we increase the distance by 3 times then the force will decrease by 1/9

ANSWER:

TWO are same prallax ANGLE

Answer:

The gravitational constant, denoted by the LETTER G, is an empirical physical constant involved in the CALCULATION of gravitational effects in Sir Isaac Newton's LAW of UNIVERSAL GRAVITATION and in Albert Einstein's general theory of relativity.

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Answer:

yes, its correct

Explanation:

It is the FIRST EQUATION of MOTION:

a=v-u/t

at=v-u

at+u=v

thus, v=u+at

Answer:

EXPLANATION:

F=ma

m=mass of object

a=acceleration produced by the object

Given,

FINAL velocity (v) =10m/s

Initial velocity (u)=0m/s (as the car START s from REST)

Time(t)=5s

Acceleration =v-u/t

10-0/5=2m/s²

Force=50×2=100N

FORCE=100N

THE CORRECT UNIT OF ENERGY IS JOULE

Explanation:

1. On the surface of earth

acceleration due to Gravity (g) = g

weight = mg

= 10*10 ( g = 10 m/s²)

= 100N

2. On the surface of moon

acceleration DUE to gravity (g) = g/6

WEIGHT = mg

= 10*10/6 ( g = 10/6 m/s²)

= 100/6 N

3. At the centre of earth :-

acceleration vary with depth as

g' =g(1-d/r)

where g' = acceleration due to gravity at depth

d = depth

r = radius of earth

At centre d = r

g' = 0

thus weight = mg

= 10*0

= 0

thus person feels weightlessness

Answer:40 KG m/s

Explanation:

Formula for FINDING MOMENTUM is P(momentum)= m(mass)*V(Velocity)

INITIALLY, man, boat and SPHERE all are in rest. so, initial linear momentum of SYSTEM = 0

now, the man throws a sphere of mass 0.5kg with speed 12m/s in horizontal direction.

so, linear momentum of sphere = mv = 0.5kg × 12m/s = 6 Kgm/s

Because, no external force is acting on system so, linear momentum will be conserved.

i.e., initial linear momentum = final linear momentum

⇒0 = 6 + linear momentum of man + linear momentum of boat.

if we assume man doesn't move with respect to boat.

then, velocity of boat = velocity of man = v' (let)

now, 0 = 6 + 62 × v' + 238 × v'

⇒0 = -6 + 300v'

⇒v' = -6/300 = -0.02 m/s

hence, velocity of boat is -2 × 10^-5 m/s

let x/2 distance COVER in TIME t1 & another x/2 distance cover in time t2

t1 = (x/2)/40

t2 = (x/2)/60

t1+t2 = x/48

average speed = x/(t1+t2) 

                     = x/(x/48)

                     = 48Km/hr

(2) as the above

t1 = x/40

t2 = x/60

t1+t2 = x/24

average speed = 2x/(x/24)

                      =48Km/hr 

(3) S1 = 6*2 

           = 12Km.

s2 = 4*3

      = 12Km.

total distance = s1+s2 = 24km.

average speed = 24/5

                      = 4.8Km/hr

ANSWER:

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Answer:

3.62 m/s

Explanation:

R1 = √4+1 = √5

r2 = √16+9 = 5

Average VELOCITY =[ (√5) + 5 ]/2

= 7.24/2

= 3.62 m/s

ANSWER:

The change in velocity of the car is 10√2 m/s

Explanation:

According to the problem the velocity of the car while MOVING towards EAST was 10 m/s

The velocity of the car while moving towards North is 10 m/s

The direction as well as velocity changes after 5 s

Now the change in velocity will be: √(INITIAL velocity)^2 + (final velocity)^2

                                                          = √ (10)^2 + (10)^2

                                                         = √ 100 + 100 =  10√2 m/s

Answer:

Audible sounds are sounds of frequency which are audible to human ear. However, on the other hand, INAUDIBLE sounds are those sounds who have frequency not audible for human ear. The frequency of audible sounds is usually 20-20,000 HERTZ, while that of inaudible is above 20kHz(kiloHertz).

Explanation:

thanks for asking

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ANSWER:

I HOPE it will HELP UH....

ANSWER : option (1) constant speed

explanation : A PARTICLE moves along a circle such that its position vector with respect to origin is

where r and ω are constants.

differentiating with respect to time,

dr/dt = [d(sinωt)/dt i + d(cosωt)/dt j ]

= (-ωcosωt i + ωsinωt j)

= (-cosωt i + sinωt j)

so, velocity of particle is v = dr/dt = (-cosωt i + sinωt j)

now, speed of particle = |v|

=

= (constant )

hence, it is CLEAR that speed of particle is constant.

hence, option (1) is correct choice

ANSWER:

The formula is QUOTIENT ×Divisor +Remainder

Explanation:

At first MULTIPLY the quotient with the divisor and then add with the remainder. HOPE it helps you

ANSWER:

EXPLANATION:

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ANSWER:

Because BUSES and trucks are heavier in weight so they need big heavy WHEELS with broader and the weight of cars and scooters are LESS so they need small and light weighted wheels.And if the wheels are small then the pressure will more on ROAD.

ANSWER:

TYPE in ENGLISH.... MATE

EXPLANATION:

typhooon is the HEAVY WATER flowing movements in the oceans

tornado is heavy winds which starts from the surface of the ground ,by which all particles go into the heavy air.

ANSWER:

for a FREQUENCY DIGRAM

Explanation:

1.2.3.4.5.6.7,-1.-2.-3.-4.-5.-6.-7

matter.Eg;sand,water,oxygen,WOOD,rock.are all different kinds of matter because all of them occupy SPACE and have mass.MATTER is classified into three TYPES;solidsliquidsgases

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Answer:

The structure of an ATOM, theoretically consisting of a positively charged nucleus surrounded and neutralized by negatively charged ELECTRONS revolving in orbits at VARYING distances from the nucleus, the constitution of the nucleus and the arrangement of the electrons DIFFERING with various chemical ELEMENTS.

EXPLANATION:

Geothermal ENERGY is thermal energy generated and stored in the EARTH.

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ANSWER:

the above is the answer

EXPLANATION:

DISTANCE PI*r

displacement is 2R

HERE IS YOUR ANSWER:-

It is given that velocity is uniform

hence , there is no change in velocity with respect to time.

therefore , as acceleration is equal to rate of change of velocity with respect to time , it is 0.

Now,

Force = ma

Force = m × 0

Force = 0 N.

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