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two parallel mirrors are a distance d apart an object is placed 10 inch in front of the right-hand mirror after 5
a blow-dryer and a vacuum cleaner each operate with a voltage of120 v the current rating of the blow-dryer is 12 a and
an object 25 cm from a convex mirror is observed to produce an image 136 cm behind the mirror what is the focal length
a bowling ball m 72 kg r 011 m and a billiard ball m 038 kg r 0028 m may each be treated as uniform spheres whatis
a pendulum of length 353 m with a bob of mass 550 kg is pulled aside until the bob makes an angle of 350deg with the
two students on roller skates stand face-to-face then push each other away one student has a mass of 99 kg and the
at standard pressure what would the temperature of water molecules be if they had a root mean square rms of velocity of
a bugle is simply a tube of fixed length that behaves as if it werean open organ pipe open at both ends a bugler by
a cubical room 25 x 107 m3 nasas vehicle assembly building is filled with nitrogen n2 gas 100 kpa and 27 degrees
in an automobile engine a mixture of gasoline and air is compressed before being ignited a typical engine has a
a space station is constructed in the shape of a hollow ring of mass 600 x 104 kg and radius 130 m the station has 200
a lead pellet with a mass of 0519 g is shot from an air gun at a speed of 118 ms it is stopped by a boulder what is the
there is evidence that elephants communicate via infrasound generating rumbling vocalizations as low as 14 hz that can
a 1110 n man stands in the middle of a frozen pond of radius 418m he is unable to get to the other side because of a
an outside loudspeaker considered a small source emits sound waves with a power output of95wa find the intensity90m
two pole-vaulters just clear the bar at the same height the first lands at a speed of 784 ms while the second lands at
a girl and her bicycle have a total mass of 40 kg at the top of the hill her speed is 50 ms the hill is 10 m high and
one of the asteroids ida looks like an elongated potato surprisingly it has a tiny compared to ida spherical moon this
5353 j of heat are removed from a gas sample while it is being compressed by a piston that does 5201 j of work what is
an iron bar of mass 099 kg slides down a frictionless incline 094 m high at the bottom of the incline it collides and
a cup of water is heated with a heating coil that delivers 11785 w of heat in one minute the temperature of the water
a bowling ball and a silver dollar are rolled down a 15 degrees incline which is 5 meters longa calculate the final
a sphere of radius 10 cm is dropped into a glass cylinder filledwith a viscous liquid the mass of the sphere is 120 g