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a fire engine moving to the right at 40 ms sound its horn frequency 500 hz at the two vehicles shown in the figure the
a uniform rod rotates in a horizontal plane about a verticalaxis through one end the rod is 600 m long weighs 100 n
a piece of sandston with a bulk volume of 13 cc is contained ina 5-cc cell filled with helium at 760 mm hg temperature
a storage tank has a diameter of 80 ft a height of 25 feet andcontains oil to a height of 15 ft the suction pumps
when you walk with a cup of coffee diameter5 cm at just the right pace of about1 step per second the coffee builds up
a source emits sound uniformly in all directions a radial line isdrawn from this source on this line determine the
a water bed has dimensions of 183 m x 213 m x 0229 m the floorof the bedroom will tolerate an additional weight of no
a girl is sitting nearthe open window of a train that is moving at a velocity of1700 ms to the east the girlsuncle
a solid sphere of weight 800 lb rolls up an incline with aninclination angle of 300 degrees at the bottom of theincline
a power plant having a carnot efficiency produces 1000 mw ofelectrical power from turbines that take in steam at 600 k
a car travels 20km at an average speed of 80kmhr and then stops for 15 mins to get fuel it then continues on the same
consider two massless springs connected in series spring 1 has aspring constant k1 and spring 2 has a springconstant k2
a copper rod has a length of 15 m and a cross-sectional area of40times10-4 m2 one endof the rod is in contact with
a massless rope is wrapped around a wheel of radius r 2 meters the wheel is mounted with a frictionless bearing on the
in a double-star system two stars of mass 60 1030 kg eachrotate about the systems center of mass at a radius of 20
the circular blad on a radial arm saw is turning at262 rads at the instant the motor is turned off in 18 secthe speed
a circular-motion addict ofmass 85 kg rides aferris wheel around in a vertical circle of radius 10 m at aconstant speed
when at rest two trains have sirens that emit a frequency of 300hz the trains travel toward one another and toward an
a long straight thin round conductor carries a linearcharge density lambda7 mucm what is the electric field in the
a molecule has a rotational inertis of 14000 upm2 and isspinning at an angular speed of 43 x 1012 radsa express the
a two-stage rocket accelerates from rest at 327 ms2 for 682seconds it then accelerates at 298 ms2 for another
a room measures 30 m by 45 m by 60 m if the heating and air-conditioning ducts to and from the room are circular with
a system consists of two positive point charges q1 and q2gtq1 the total charge of the system is 620 muc and each charge
long straight wire a long straight wire has fixed negative charge with a linear charge density of -31 ncm the wire is