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two loudspeakers face each other vibrate in phase and produceidentical 441-hz tones a listener walks from one speaker
a sledge loaded with bricks has a total mass of 176 kg and is pulled at constant speed by a ropeinclined at 209deg
a car travels at 40 kmh for 30 min and 60 kmh for 15min how far does it travel in this
a uniform cylindrical can rolls up a slope at an initial linearvelocity of 15ms assuming muk 0106 and theta110o how
a soccer player kicks a ball horizontally off a 400 m cliff into a pool of water if the player hears the sound of the
a diving bell in the shape of a cylinder with a height of280 m is closed at the upper end andopen at the lower end the
when catching a baseball a catchers glove moves by 9 cm along the line of motion of the ball if thebaseball exerts a
a cessna aircraft has a lift-off speed of 120 kmha what minimum constant acceleration does theaircraft require if the
a rocket is fired vertically and ascends with a constantvertical acceleration of 20 ms2 for 10 min its fuelis then all
a parallel-plate capacitor with area 0500m2 and plate separation of 400mm is connected to a 300 v batterya what is the
a key falls from a bridge that is 52 mabove the water it falls directly into a model boat moving withconstant velocity
a total of eight tiny conducting spheres each carrying a charge of-105 nc are placed one each at thecorners of a cube
a 220-nc charge in ane-field is moved by an applied force if 550 nj of work are done on the charge by theforce what is
a charge q is located at the origin while anidentical charge is located on the x axis at x 0690 m a third charge of 2 q
a steam catapult launches a jet aircraft from rest from theaircraft carrier john c stennis giving it a speed of 205 mih
a motorist drives north for 320minutes at 765 kmh and then stopsfor 150 minutes he then continues north traveling 130
water is flowing through a pipe with a constriction the diameter of the narrow section is one-half the diameter of the
a fluid with viscosity n flows through a tube of radius r and length l a second fluid with viscosity 4n flows through
the wave function for a harmonic wave on a string is yxt 100mmsin628m-1x 314 s-1ta in what direction does this wave
assume a 400-cm-long violin string has a mass of 120 g andis vibrating in its fundamental mode at a frequency of 500hza
the inner and outer surfaces of a cell membrane carry a negativeand positive charge respectively because of these
an electron is moving with a speed of 085c in adirection opposite to that of a moving photon calculate the relative
metal sphere a of radius 12cm carries 6 muc of charge and the metal sphere b radius 18cm carries -4 muc of charge if
a steel ball of mass m is fastened to a light cord of length land released when the cord is horizontal at the bottom
a helium-neon laser beam has a wavelength in air of 633 nm ittakes 143 ns for the light to travelthrough 250 cmof an