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an object is placed 14 cm to the left of a two lens combinationthe left hand lens has a focal length of 12 cm the right
a ball of mass m 21 kg moving with a speed of v0 152 msstrikes an identical ball which was initially at rest after
is it possible for the efficiency of some device or machine to be greater than 1 either give and example where
a 45 kg figure skater is spinning on the toes of her skates at10 revs her arms are outstretched as far as they willgo
water flows over victoria falls which is 128 m high at an average rate of 120 times 106 kgs if two thirds the potential
to focus a camera on objects at different distances the converginglens is moved toward or away from the image sensor so
the two loudspeakers in the drawing are producing identical soundwaves the waves spread out and overlap at thepoint p
1 a an electron and a proton are eachaccelerated from rest in a uniform electric field of 20 times105 vm what are their
are the following statements true or false1 two balls one larger than theother roll without slipping across a
a wheel of mass 124kg and radius 044 i 05mr2 starts from rest and rolls without slipping for a distance of 17m down a
the electromagnetic wave that delivers a cellular phone call to acar has a magnetic field with an rms value of 138e-10
the average intensity of sunlight reaching the earth is 1390 wm2 a charge of 238 x10minus8 c is placed in the path of
an ac circuit contains a 100 omegaresistor a 630 microf capacitor and a370 mh inductor connected in series to anac
a speeder is pulling directly away and increasing his distance from a police car that is moving at 251ms with respect
a parallel plate capacitor has two plates each of area30x10-4 m2 separatedby 35x10-4 m the space betweenthe plates is
a square wire loop with 187 m sides is perpendicular to a uniformmagnetic field with half the area of the loop in the
the optical power ofan optical device of focal length f is 1fthe unit of which is 1m or mndash1 ordiopter an image is
a uniform magnetic field is perpendicular to the plane of acircular loop of diameter 12 cm formed from wire of diameter
in a youngs double-slit experiment two rays of monochromaticlight emerge from the slits and meet at a point on a
when a ball is thrown upward it spends the same amount of time on the way up as the way down- as long as air resistance
a charging bull elephant with a mass of 5240-kg comes directly toward you with a speed of 455ms you toss a 0150-kg
a 0430-kg blocknbsp is attached to a horizontal spring that is at its equilibrium lenght and whose force constant is
a cockroach of mass m lies on the rim of a uniform disk of mass40m that can rotate freely about its center like a
two coils are at fixed locations when coil 1 has no current andthe current in coil 2 increases at the rate 154 as the
a find the maximum rate of deceleration of a car on a dry levelroad assuming the coefficient of static friction between