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The electric dipole moment is a measure of the separation of positive and negative electrical charges within a system, that is, a measure of the system's overall polarity.

Magnitude of charge of electron and proton q = 1.6 x 10⁻¹⁹ C

Distance between electron and proton 2a = 4 . 3 nm = 4.3 x 10⁻⁹ m

Electric dipole moment = q x 2a = 1.6 x 10⁻¹⁹ X 4.3 x 10⁻⁹ = 6.88 x 10⁻²⁸ cm

p =q*dSo, for this one, being e=1.6E-19 C the elementary chargep = 1.6E-19 * 4.30E-9p = 6.88E-28 C.m

Also, p is a vector, so you need its orientation, which is from the electron to the proton.

It happens if one surface is smooth and the other is rough. On smooth surface bearing travels faster due to less friction.

Electric dipole moment is defined as the product of the magnitude of one of the charges and the distance between them. It is a a vector quantity .its direction is from the negative charge to the positive charge. It's unit is coulomb meter.

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Distance travelled = Avg. Velocity * Time = 6.25*4=25m

Formula: Speed=distance/timeGiven:distance =250 kmtime= 4 hrsspeed =250/4=62.5 km/hr

U is proportional to x^2

A meter scale has a least count of 1 mm so change in reading is +- 1 mm Now 1.41/1.4= 1.007 %

The minute hand of a clock covers 360 deg in 60 min or 6 deg/min.

The hour hand of a clock covers 30 deg in 60 min or 0.5 deg/min.The ratio of the angular speed of the minute to the hour hand = 6/0.5 = 12:1

Parallelogram Law of Vector Addition states that when two vectors are represented by two adjacent sides of a parallelogram by direction and magnitude then the resultant of these vectors is represented in magnitude and direction by the diagonal of the parallelogram starting from the same point

in need to know it's working and derivation

ParallelogramLaw ofVector Addition states that when twovectorsare represented by two adjacent sides of a parallelogramby direction and magnitude then the resultant of these vectorsis represented in magnitude and direction by the diagonal of the parallelogramstarting from the same point.

If two vectors are considered to be the adjacent sides of a parallelogram, then the resultant of two vectors is given by the vector that is a diagonal passing through the point of contact of two vectors.

Yes. It is called Triangle law of vector addition.

Triangle law of vector additionstates that when twovectorsare represented by two sides of atrianglein magnitude and direction taken in same order then third side of the third side of thattrianglerepresents in magnitude and direction the resultant of thevectors.

A central processing unit (CPU) is the electronic circuitry within a computer that carries out the instructions of a computer program by performing the basic arithmetic, logical, control and input/output (I/O) operations specified by the instructions.

Use the formula for displacement in nth second

Sn=u+a/2(2n-1)

here u=0 as it is starting from rest, a=4/3m/s^2

S3=0+4/6(2(3)-1)

S3=4/6(5)

S3=20/6

S3=10/3 m

energy =power *time

E=400*8=3200 Wh/day

for 30 days E=3200*30=96000Wh=96 kWh

so total cost=96*3= Rs 288

A and B make the base and the height of a right-triangle, of which the hypotenuse is sqrt(8²+6²)v or 10 kmphThe resultant is 10 at an angle 53.13 degree to BA or B are angled to the N-E and N-S, or at 45 deg. to the vertical axis, hence the resultant is at 53.13-45 or 8.13 degree to vertical axis.

tanθ for 8.13 degree = 0.14285714285714

and the same value is tan^-1(1/7) . option D.

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Initial velocity=40m/sfinal velocity=40m/stime=10 seconds

v=u+at40=40+10a10a=0a=0m/s

You need the measurements for triangle?

If we take ‘r’ as the distance ofIAORIAORfrom the axis of rotation, then ‘r’ decreases on left side as the object moves forward

So, for leftv=ωr′<ωrv=ωr′<ωr(for right point)

So, the roller will turn to the left as it moves forward.

C is the resultant of vectors A and B. The resultant is closer to the vector with greater magnitude. Hence, option C is correct.

Displacement is the shortest distance possible between initial and final position.As the athlete is in circular motion , displacement is zero. [ THis is because , the initial and final position is the same ]

Distance covered in 1 round = Circumference of the circle

Circumference of the circle = 2πr

Diameter = 200 mRadius = 100 m

Distance covered in 1 round[ 40 sec ] = 2 × 22/7 × 100 = 628.57 m

Distance covered in 1 sec = 628.57 ÷ 40 = 15.71 m

2min 20 sec = 140 secDistance covered in 140 sec = 15.71 × 140 = 2199.4 m

it's 40 min or sec

Total time duration in consideration : 2 min 40 secs = 160 secs

No of complete rounds in this time = 160/40 = 4 rounds

Therefore he will be exactly at the point where he started. Hencehis displacement will be 0, although he will cover a distance of 4 (2πR)

2min 20 sec=140 sec140/40=3.5he will complete 3 and half roundsdisplacement is the shortest distance between the initial and the final points. so displacement will be 2R.

2min 20sec = 140seche completes one round in 40 secIn 140 sec, he completes 3and half round , So displacement = 2R

Ans: Time taken = 2 min 20 sec = 140 sec. Radius, r = 100 m. InTime to complete one round = 40 sec So, Round completed in 140 sec = 140 ÷ 40 = 3.5 (three and a half) round.

Or, distance covered = 2 x 22/7 x 100 x 3.5 = 2200 m.

At the end, the athlete cavers half round and will be at a distance = diameter of circle. ie displacement = 200m.

Two sources are said to be coherent if they have exactly same frequency, and have zero or constant phase difference. Most of the light sources around us - lamp, sun, candle etc are combination of multitude of incoherent sources of light

Let S be the distance from the point car A start to the distance where they both meet and t be the time taken to by both car to meetCar A:S=10tCar B:S-100 = 5t

dividing both equation we get2S-200=SS=200

ie... they both meet at distance of 200m from the start point of A ... which implies the distance from origin is 200+100 = 300mtime taken

=>S=10t=20 secondsthey take 20 seconds to meet

F=( mv^2)/r

Where F=centripetal force

m=mass of the object

v=velocity

r=distance from the centre

uhhh. sry but i did'nt got it!!

thank you for your help..☺

Buoyancy of a body depends on the following factors: Volume of the body submerged in the liquid or volume of the liquid displaced.Densityof the liquid. Acceleration due to gravity.