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an engine absorbs 1695 j from a hotreservoir and expels 1204 j to a coldreservoir in each cyclea what is the engines
a 100 kg box is pulled by a rope in the direction 20 degreesabove the horizontal the box is moving in horizontal
a 13 g bullet traveling 235 ms penetratesa 20 kg block of wood and emerges cleanly at 174 ms if the block is stationary
you are standing at a distance d from a speaker that emits sound waves in all directions you walk 250 m toward the
a 9200 kg boxcar traveling at 18 ms strikes a second boxcar at rest the two sticktogether and move off with a speed of
an ac generator has 90 rectangular loops on its armature each loopis 15 cm long and 6 cm wide the armature rotates at
an ideal gas has a pressure of 25 atm a volume of 10 l at a temperature of 30deg c how many molecules are there in the
a 200 gram block attached to the end of an ideal springhorizontal with force constant k 70 nm undergoes simpleharmonic
a 83 kg solid sphere with a 19 cm radius is suspended by a vertical wire a torque of 041 nmiddotm is required to rotate
a carnot engine operates between a high temperature reservoir at 492 k and a river with water at 290 k if it absorbs
a carnot engine extracts 529 j of heat from a high-temperature reservoir during each cycle and rejects 225 j of heat to
a disk rotates about its central axis starting from rest and accelerates with constant angular acceleration at one time
a neutron star is composed of neutrons and has a density that isapproximately the same as that of a nucleus what is the
an object is released from rest when it is a height habove the surface of a planet of mass m and radiusr what is the
if you move at 14ms toward a 2300hz source that is movingtoward you with a ground speed of 38ms what frequency do you
a particle of charge -60nc is placed at the center of anon-conducting spherical shell of inner radius 20cm and
the sound in a classroom is 68000 times asintense as the minimum threshold of hearing what is the intensity level of
light in a vacuum is incident on a transparent glass slab theangle of incidence is 320deg the slab is then immersed in
a flat sheet of crystalline quartz has athickness of 31 cm it is on top of aflat sheet of diamond that has a
waterdensity100x103 kgm3 flows at100ms through a pipe with radius 0030m the pipe goes up tothe second floor of the
a nearsighted patients far point is 0855m from her eyes she is able to see distant objects in focus when wearing
your car engine slows down from 3700 rpmto 1600 rpm in 40 sa calculate its angular acceleration assume d constantrads2b
two isotropic point sources of light s1 ands2 are separated by a distance d 250mum along a yaxis and emit in phase at
an airplane has an effective wing surfacearea of 10 m2 that is generating the lift force inlevel flight the air speed
after fixing a flat tire on a bicycle you give the wheel a spina if its initial angular speed was603 rads and it