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Questions (47)

If x+1/x=2 then the value of x^2014+1/x^2016
1. 2 answers
2. 437 views
1 Mole of bacl3
1. 2 answers
2. 373 views
Find (-5 i) (1/8 i)
1. 2 answers
2. 393 views
when 8.4 g of NaHCO3 is added to a solution of CH3COOH weighing 20 g .It is observrd that 4.4 g of CO2 is releasd into
1. 1 answer
2. 1,713 views
a bullet fired with a speed of 150 m/sec from car whose velocity is 25/3 m/sec to car next to it whose velocity is 50 m/sec.what
1. 0 answers
2. 429 views
A copper block of mass 500gm and spcific heat0.1cal/gm celcius is heated from30degrees to 290degrees celcius the thermal
1. 0 answers
2. 597 views
a 2 digit number is 9 times the sum of its digits .if it's ones and tens digits be x and y.write a linear equation in two
1. 1 answer
2. 459 views
Acetylene(C2H2), an important fuel in welding, is produced in the laboratory when calcium carbide (CaC2) reacts with water:
1. 1 answer
2. 3,402 views
liquid water of mass 10 kg & temperature 20 degree celsius mixed with 2 kg of ice at -5 degree celsius till equilibrium is
1. 1 answer
2. 1,412 views
length of a rectangle exceeds its breadth by 4 m. if the parimeter of the the rectangle is 84 m, find its length and breadth.?
1. 6 answers
2. 1,992 views
Why electric dipole moment between two charges points from negative to positive charge.
1. 0 answers
2. 566 views
The shear stress in a plane normal of which makes an angle of 30 degree with the direction of maximum principal stress will be ?
1. 0 answers
2. 528 views
Wheel of car is making 5 revolution per second . if the diameter of the wheel is 84cm .find its speed in km/h
1. 1 answer
2. 638 views
A conductor in a shape of a spherical shell of radii 10 and 12cm in charged to 20 micro coloumb.1) Find the electric field at
1. 0 answers
2. 595 views
The charge per unit length on a long, straight filament is -87.0 µC/m.(a) Find the electric field 10.0 cm from the filament.
1. 1 answer
2. 2,313 views
The charge per unit length on a long, straight filament is -87.0 µC/m.(a) Find the electric field 10.0 cm from the filament.
1. 0 answers
2. 576 views
The charge per unit length on a long, straight filament is -87.0 µC/m.(a) Find the electric field 10.0 cm from the filament.
1. 0 answers
2. 773 views
a) Two protons in a molecule are 3.80 multiplied by 10-10 m apart. Find the electrical force exerted by one proton on the other.
1. 1 answer
2. 775 views
A rod 14.0 cm long is uniformly charged and has a total charge of -20.0 µC. Determine the magnitude and direction of the
1. 1 answer
2. 4,442 views
In the Bohr theory of the hydrogen atom, an electron moves in a circular orbit about a proton, where the radius of the orbit is
1. 1 answer
2. 1,082 views
(a) Two protons in a molecule are 3.80 multiplied by 10-10 m apart. Find the electrical force exerted by one proton on the
1. 0 answers
2. 728 views
A rod 14.0 cm long is uniformly charged and has a total charge of -20.0 µC. Determine the magnitude and direction of the
1. 0 answers
2. 994 views
Integral sin 8x/2 cosx/2 dx
1. 1 answer
2. 399 views
Integral -csc^2 (2x+9)dx
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2. 402 views
integral cos(4z-5)dz
1. 1 answer
2. 388 views
integral 3z^6 sqrt(2-3z^7)dz
1. 1 answer
2. 354 views
Use the indicated substitution to evaluate the integralintegral 18sec(2x) tan(2x)dx, u=2x
1. 1 answer
2. 653 views
Evaluate the following indefinite integral by using the given substitution to reduce the integral to standard formintegral
1. 0 answers
2. 861 views
Evaluate the following indefinite integral by using the given substitution to reduce the integral to standard formintegral
1. 1 answer
2. 2,796 views
find dy/dx y= integral upper limit tanx and lower limit 0 of dt/1+t^2
1. 1 answer
2. 521 views
Evaluate the integral upper limit sqrt11 and lower limit 1 of (s^2 + sqrt 5)/ s^2
1. 1 answer
2. 579 views
The sum of the tens and ones digits of a 2-digit number is 12.The digit in the tens place is greater than the digit in the ones
1. 2 answers
2. 449 views
A 2-digit number has a greater tens digit than the ones digit.The difference between the tens and ones digit is 3. The sum of
1. 1 answer
2. 589 views
what is evidnece that cathode rays are part of matter?
1. 1 answer
2. 432 views
1)why bohr orbit are called stationary orbit? 2)what do you mean by saying energy of electron is quantised?
1. 0 answers
2. 354 views
1)why bohr orbit are called stationary orbit? 2)what do you mean by saying energy of electron is quantised?
1. 0 answers
2. 398 views
balance the equations 1)Mg3N2+N2+H2O=Mg(OH)2+NH3 2)KMnO4+H2S+H2SO4=KHSO4+H2O+MnSO4 3)AS2O3+SnCl2+HCL=SnCl4+AS+H2O
1. 2 answers
2. 1,179 views
1)nitrogen atom has atomic no 7 and mass no 14.hydrogen atom has atomic no 1 and mass no 1.what is no of protons and neutrons of
1. 2 answers
2. 603 views
Find the area of the triangle whose vertices are (2,3),(3,4),(-2,-4).
1. 1 answer
2. 557 views
a gun is fired at a distance of 24.3km away from man. he hears the sound after 27 second. find the speed of sound at which it
1. 3 answers
2. 824 views
A uniform chain 10m long and weighing 6 kg permetre hangs vertically.calculate the work required to wind it up
1. 1 answer
2. 1,522 views
Factor completely and then place the factors in the proper location on the grid.4n2 + 28n + 49
1. 2 answers
2. 835 views
A person walks in the following pattern: 2.9 km north, then 1.9 km west, and finally 8.0 km south. How far and in what direction
1. 1 answer
2. 915 views
if co-efficient of friction between tyre and road is0.5, what is smallest radious at which car turn on a horizontal road when
1. 0 answers
2. 551 views
a wheel having diameter 2m starts from rest and accelerates uniformly to an angular velocity of 75 revoulutions per minute in
1. 2 answers
2. 1,039 views
if co-efficient of friction between tyre and road is 0.5, what is smallest radious at which car turn on a horizontal road when
1. 1 answer
2. 697 views
i want to make a chart on mathematicians
1. 1 answer
2. 465 views

Answers (9)

Very nice 😊 I m very happy about that
U= (-3/4)x-7/3 Thus a perfect negative correlation between u and x So correlation between u and y= (-0.6*(-3/4)/(-3/4)= 0.6
ntyjhyt
yes
siddharth sharma why are you taking taking tail of train as 3u
mein gawar hu mujhe nahi ata
The normal stresses at a certain point in a body are 80MPa tension and 50Mpa compression. There are also shear stresses across the plane of tension and compression equal to 30MPa.Calculate the maximum direct stress and maximum shear stress in the material.
Factor the following polynomial completely. -x2y2 + x4 + 9y2 - 9x2
solve by molarity =no. of moles divide by volume in litres....... so let the mass be in x grms... then : 2.50*0.630=x grms so, x grms of KCl =1.575 grams is the answer

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