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Can anyone explain the concept of derivatives?

In a Covalent Bond how The same electron can rotate in two atoms?

ABC is a Right Triangle ,right angled at B. C(o,r) is the incircle and o is the incenter of the triangle.AB=5,BC=12,what is the radius of incircle?

An object of length #2cm# is placed at a distance of #2.5*f# from a concave mirror where f is its focal length. what is the length of the IMAGE?

A rod of length #f/2# is placed along the axis of a concave mirror of focal length #f#.IF the near end of the REAL IMAGE formed by the rod just touches the far end of the ROD,what is its magnification?

I have some chair and tables.If i place two chair at each table ,I have extra chair.If i place 3 chairs at each table,i have one table with no chairs.What is the sum of the total umber of tables and chairs?

#sinx+sin^2x+sin^3x#=1 the what is #cos^6x 4cos^4x+8cos^2x#=?

#7cosec theta 3 cot theta =7#,then what is the value of 7#cot theta3 cosec theta # ?

How to give symbol of modulus?

8g of #"E"_2"O"_3# contain 5.6g of #"E"#. How many moles of #"E"# does a 16.8g smaple of element #"E"# contain?

For the reaction,#2x#+#3y#+#4z## rarr## 5w#
Initially if 1 mole of #x#,3 mole of #y# and 4 mole of #z# is taken and 1.25 mole of #w# is obtained then what is the % yield of this reaction?

When 2 moles of hydrogen is heated with 2 moles of iodine,2.96 moles of hydrogen iodide is formed.what is the equilibrium constant for the formation of hydrogen iodide?

A block of metal wheighing 2 kg is resting on a frictionless surface,if struck by a jet releasing water at the rate of 1kg/s and at a speed of 5m/s.what is the initial acceleration of the block ?

A dish of mass 10g is kept horizontally in air by firing bullets of mass 5g each at the rate of 100/s. I the bullets rebound with the same speed,what is the velocity with which bullets are being fired?

A ball of mass 0.20 kg falls freely from a certain height and rebounds elastically with a speed 10m/s.What is the change in momentum of the ball?

If #sin theta + cos theta =p#, what is #sin^2 theta + cos^4theta# in terms of #p# ?

What are progessive lens?

When are important subjects like economics are going to be added?

Why most of the alkanes are Hydrophobic in nature?

What is the principle of LIKE DISSOLVES LIKE ,EXPLANATION needed,and also limitations?

Sea water contains #65 xx10^3# #"g/L"# of bromide ions. If all the bromide ions are converted to produce #Br_2#,how much sea water is needed to prepare 1 kg of #Br_2#?
please tell the method.

What is the strength in g/ litre of a solution of #H_2SO_4#,12 ml of which neutralized 15 ml of N/10 NaOH solution?

#200# ml solution of #H_2O_2# completely oxidises 125g # Fe^+#. Find out the molarity and volume strength of #H_2O_2#?

WHAT is the domain of defination of #log_4 (log_1/2 (1+ 6/root(4)x) 2)#?

What is the domain of defination of #y= log_10 (1 log_10 (x^2 5x +16))#?

A particle is projected from the origin #(0,0)# in the #xy# plane at angle of #37^o# with the x axis with a speed of #10# #ms^1#, its acceleration being #(5 hati + 10 hatj)# #ms^2#. What is the speed of the particle when the xcoordinate is again zero?

The equation of the trajectory of particle is #x=sqrt3 y5y^2#.The particle is at t=0 at origin.Its acceleration is #veca=10 hati#.What is its initial velocity?

Given #3 TanA*TanB=1#,show that 2cos(A+B)=cos(AB)
?

What is the velocity of a particle for #t=0 to t=10# whos acceleration is
#veca =3t^2 hati+5t hatj(8t^3+400)hatk#?

An electron in a hydrogen atom in its ground state absorbs twice of its ionization energy what is the wavelength of the emitted electron?

Why cant we upload more that one pictures on answer? It takes a long time to write coding ,especially while in calculation,we can easily write on paper and upload the picture?

A butterfly is flying with velocity #10 i +12 j m/s# and wind is blowing along x axis y
with velocity u. If butterfly starts motion from A and after some time reaches point B, What is the value of u ?

What is the proof of# E=mc^2#?

Having errors while solviing maths is a common problem,is there any tip to study longer better and accurate?

Three rods each of mass M and length L, are joined together to form an equilateral triangle. What is the moment of inertia of a system about an Axis passing through its centre of mass and perpendicular to the plane of the triangle?

At #627^@"C"# and #"1 atm"#, #"SO"_3# is partially dissociated into #"SO"_2"# and #"O"_2# .
If the density of the equilibrium mixture is #"0.925 g/L"#, what is the degree of dissociation?

A small block is placed on a wooden plank which is undergoing SHM in vertical direction with a period of T.What is the maximum amplitude of motion so the block does not leave the plank?

Let #x,y,z# are three real and distinct numbers which satisfy the Equation
#8(4x^2+y^2)+2z^24(4xy+yz+2xz)=0#,then Which of The following options are correct?
(a) #x/y=1/2#
(b)#y/z=1/4#
(c)#x/y=1/3#
(d)x,y,z are in A.P

A point moves in #xy# plane according to #vec r=3cos(4t)veci +3(1sin4t) vecj#. What is the distance travelled by the particle in 0.5 sec ?

A bead of mass #m# can slide on a thin vertical rod,with sliding coefficient #mu =0.4#.The rod is translated horizontally with a constant acceleration of #a#. QUESTION below.?

What is the range of the function #y=sqrt(1cosxsqrt(1cosx(sqrt(1cosx ......oo# ?

How to Remove Nitro Group from nitrobenzene ring ?