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A spider is hanging by means of its own silk thread directly above a transparent fixed sphere of r = 20cm .... the refractive index of material of sphere is root(2).... and height of the spider is 2r = 40cm .... an insect initially sitting at the bottom directly below the spider starts crawling along vertical circular path with constant speed pi/4 cm/s.. for how long will the insct be invisible to the spider. Assume that it crawls once around the circle .Solution) Spider is able to see only half of the sphere which is topmost hemispherical surface. when insct enters in bottom hemispherical surface it becomes invisible for the spider. a/c question insct is travelling vertical circular path it travels pi/4cm in 1sec.then it will travel 2pi r dist i.e. 40picm in 160sec. hence it will travel pi r i.e20pi (half circle) in 80s.
An electron follows a helical path in a uniform mag-netic field of magnitude 0.300 T. The pitch of the path is 6.00 um, and the magnitude of the magnetic force on the elec-tron is
The symmetrical scissors truss shown below is supported at point A and D. The support at D is a rocker bearing and does not produce a horizontal reaction. A, B, C, D, E & F are pi
Besides solid, liquid, and gas, what is the fourth form of matter? Ans: The fourth form of matter is plasma.
Tin: Atomic number 50 Symbol Sn Atomic weight 118.69 Discovery Known since ancient
Motion of an object in a straight line is known one dimensional motion. The location of a particle in one dimensional motion can be defined by only one variable (say x). For a pa
Armature core: It houses the armature conductors or coils and causes them to rotate and as cuts the magnetic flux of field magnets. It also gives a path of very low reluctanc
Does solar radiation contain a complete spectrum of all forms of electromagnetic radiation? Yes it does. It have all the forms of radiation, but 99% of its energy is carried
Poisson equation (S.D. Poisson) It is the differential form of Gauss' law, such as, div E = rho,
what are some properties of transition metals
Roche limit: The position about a massive body where the tidal forces because of the gravity of the primary equivalent or exceed the surface gravity of a particular satellite.
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