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1 in converting electrical energy into light energy asixty-watt incandescent light bulb operates at about 22 efficiency
lens l1 has a focal length of 15o cm and is located afixed distance in front of the film plane of a camera lens l2 has
the wire in the drawing carries a current of 10 a suppose thata second long straight wire is placed right next to this
a lighted candle is placed 35 cm in front of a diverging lens the light passes through the diverging lens and on to a
in a location where the speed of sound is 337 ms a 2000 hz sound wave impinges on two slits 30cm aparta at what angle
light of wavelength 500102 nm illuminates a pair of slitsseparated by 0280 mm if a screen isplaced 210 m from the slits
consider a current carrying loop of wire an electron is shotdirectly through loops center perpendicular to the plane of
the distance from the sun to jupiter is 52 times longer than the earth-sun distance take the intensity of sunlight at
a pipe is opened at both ends its length is 2281cm if i excite standing waves in the pipe by blowing air over one of
a 400g mass is attached to a spring causing it to stretch a vertical distance of 2cmnbsp the mass is then pulled
a block of wood has a mass of 377 kg and a density of 589 kgm3 it is to be loaded withlead so that it will float in
a child slides down a slide with a 21circ incline and at the bottom her speed is preciselyhalf what it would have been
a cubical block of wood 100 cm on a side floats at the interfacebetween oil and water with its lower surface 150 cm
a block of wood with volume v floats in waterwith 067v submergedin oil the block floats with 085v of its volume
a child sits at the edge of a plarform rotationg at 30 rpmnbsp the platform isnbsp 10 m in diameter what is the period
a square loop and a rectangular loop are each made from thesame length of wire each loop contains a single turn and
a uniform solid spherical asteroid with mass12x1013 kg and radius 10 km isrotating with a period of 52 hours a
a projectile is launched vertically from the surface of the moonwith an initial speed of 1500 msnbspnbsp at what
a smooth block on a frictionless surface is attached to a spring pulled to the right a distance of 4 cm and the
as shown in the figure a pond has the shape of an inverted conewith the tip sliced off and has a depth of 50 m the
a 111 omega resistora 92 microf capacitor anda 297 mh inductor are connectedin series with a 120 v rms source with
the rms current through a light bulb is 0947 a when the bulb is connected to a standard120 v rms sourcea find the bulbs
water is supplied to an office building 415 m high through a pipe at ground levela find the minimum pressure in the
two wheels have the same mass and radius of 50 kg and 038 mrespectively one has a the shape of a hoop andthe other b
two air carts of mass m1 084kg and m2 042 kg are placed on a frictionless track cart 1 is at restinitially and has a