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a point source S is placed midway btw 2 converging mirrors having equal focal length f find d values of d fr which only 1 image is formed

a light ray falling at an angle of 45⁰

^{with d surface of a clean slab of ice of thickness 1m is refracted into it at an angle of}30^{0 calculate d time taken by d light rays to cross d slab speed of light in vacuum = 3 x 10^8m/s}

^{a vessel contains water upto a height of 20cm & above it an oil upto another 20 cm d}_{^1=1.332=1.30}

_{find d apperent depth of d vessel when viewed 4m above}

_{find d max angle of refractionwhen a light ray is refracted 4m d glass( =1.5)}

_{to air}

a solid cylinder of mass M & rad. R rotates about a frictious horizantal axis 2 similar masses m each r suspended with d help of 2 ropes wrapped around d cylinder if d system of masses is released 4m restwat willb tension in d rope

rate me if satisfied correct me if wrong

edit d temperatures r required 4m 430--470k

CH3OK is d catalyst

i think d answer is vinyl ethyl ether

4r eg 430-470 k
HC=_ CH +CH3OH-------------> CH2 =CHOCH3
CH3OH

can u explain me with reason plzzzzzzzzzzzzzzzzz

d relativ reactivity of 1^0:2^0:3⁰

^{hydrogens to chlorination is 1 : 3.8 : 5}

^{a) calculate d relativ amounts of all dese mono chloro butanes obtained 4m d reaction of n - butane with Cl ₂}

_{^{b) calculate d % of different of different products}}

^{_{2) d relativ reactivity of 1}0 : ₂0 : ₃0}

_{hydrogens to bromination is}

_{1: 82 : 1600 calculate d relativ amounts of each product of mono bromination of iso butane}

_{_{3)singlet methylene is 4med by decomposition of diazo methane it b inserted btw d C ---H bonds in an alkane wat r d different products of random insertion of methylene singlet in n-- pentane}}

HCN & HNC R .................. ISOMERS EXPLAIN

C6H4Cl2+Cl2______Fe___________=C6H3Cl3

^{WHY D PRODUCT IS A PARA ISOMER}

^{C4H8CAN 'VE TOTAL OF ...............ISOMERSGEOMETRICAL NOT INCLUDED}

im tensed in rotatory motion & gravitation ,optics can i complete dese topics today can any body suggest d important points &advices plzzzzzzzzzzzzzzzzz

edit its actually L/pi rt3

a metal piece of mass 160g lies in equilibrium inside a glass of water d piece touches d bottom of d glass at a small no. of points if d density of d metal is 8000kg/m^3find d normal force exerted by d bottom of d glass on d metal piece.

if error in d measurement of mass is 0.8%& in vol. it is 0.4% den error in d density is ( ans:1.2% )

A hollow spherical body of inner & outer radii 6cm &8cm resply floats half submerged in water find d density of d material of sphere

a reflecting surface is represented by d equation

Y=2L/

Sin(

x/L), where 0

x

L

A ray of light travelling horizantally becomes vertical after reflection with d surface d co ordites of d point where dis ray is incident is [ans : L/3,

3L/5]

water leaks out from an popen tank thru a hole of area 2mm^2 in d bottom suppose water is filled upto a height of 80cm & d area of cross section of d tank is 0.4m^2 d pressure at d open surface & at d hole r equal to atmospheric pressure neglect d small velocity of water near d open surface in d tank

a)find d initial speed of water coming out of d hole b) find d sped of water coming out when 1/2 of d water has leaked out c)find d vol of water leaked out during a time interval dt after d height remained is h dus find d decrease in d height dh in terms of h &dt from d result of part c find d time reqd for d 1/2 of water to leak out

ozone belongs to which group of d periodic table

a)IV b)V c)VI d)VII

H2S is passed thru KMnO4 soln,v get

a)potassium sulphide b)sulphur c)potassium sulphite d)manganese sulphide

when MnO2 is added to KClO3 in d preparation of oxygen d dcomposition temperature of KClO3 is reduced from 350 C to

a)300 C b)150 C c)250 C d) room temperature

r u sure dat square rt for numerator can u check it 1ce

u can try fr tmh & dasgupta too very intersting sums r givn

wah wat an ansr hers my salute to u ur genius