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a boy scout starts a fire by using a lensfrom his eyeglasses to focus sunlight on kindling 56 cm from the lens the boy
a pendulum has a length l 130m it hangs straight down in a jet plane about to take off as shown by the dotted line in
a proton and an electron are moving due east in a constant electricfield that also points due east the electric field
a positively charged particle of mass 72x10-8 kg istraveling due east with a speed of 85 ms and enters a 031-tuniform
two balls with masses of 20 kg and 60 kg travel toward each other at speeds of 12 ms and 40 ms respectively if the
two rods one of aluminum and the other of copper are joinedend to end the cross-sectional area of each is 40 x
two identical small insulating balls are suspended byseparate 025-m threads that are attached to a common point on
an electron q -16e-19 c m 91e-31 kg has an initialvelocity t0 of v 16e5 ms j 24e5 ms k and is moving in a
a home run is hit in such a way that the baseball just clearsa wall 21 m high located 130 m from home plate the ball is
suppose white light falls on two slits separated by a shortdistance one slit is covered by a red filter 700 nm andthe
a 10-turn circular couil of radius 20mm carries a current of050 a find the magnetic field magnitude at its
two identical conducting spheres each having a radius of 07 cm are connected by a light conducting wire of length 09 m
a 251 kg wooden raft floats on alake when a 76 kg man stands on theraft it sinks 90 cm deeper into thewater when he
aparallel-plate capacitor has square plates of edgelength 12 cm and a platespacing of 011 mm if the gap between the
a uniform rod rotates in a horizontal planeabout a vertical axis through one end the rod is 1400 mlong weighs 2333 n
how would you solve problem 52 from chapter 25 from the book fundamentals of physics if the battery remained
the angular momentum of a flywheel having arotational inertia of 0240 kg m2 aboutits axis decreases from 370 to 130 kg
an airplane flying at a distance of 86 km from a radio transmitterreceives a signal of intensity 12 muwm2 what isthe
a 1100 kg cannon which fires a 50 kg shell witha speed of 506 ms relative to the muzzle is set at anelevation angle of
a spring is first stretched 20 cm from its unstressed length it is then stretched an additional 17 cmhow does the work
a firehose 17 m long is uncoiled bypulling the nozzle end horizontally along a frictionless surface atthe steady speed
an airplane with a speed of 40 ms isclimbing upward at an angle of 52degwith respect to the horizontal when the planes
an object falls from a height h from rest if ittravels a fraction of the total height of 06798 in the last 100s find
a projectile is fired horizontally from a gun that is 410m above flat ground the muzzle velocity is 260 mshow long does
a three-step cycle is undergone by 34 mol of an ideal diatomicgas 1 the temperature of the gas is increased from 200 k