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two spherical shells have a common center a -100x10-6 c charge is spread uniformly over the inner shellwhich has a
an alpha particle is a helium nucleus that consists of two protons bound with two neutrons an alpha particle moving
a horizontal pipe contains water at a pressure of 150 kpa flowing with a speed of 20 ms the pipe narrows to one-half
a sound wave in air has a frequency of 500 hz and a wavelength of 068 m what is the air
the big bang theory suggests leftover background radiation this corresponds to the baseline temperature of space which
a canoeist attempts to paddle a canoe due east directly across a river unfortunately there is a current flowing south
oppositely charged parallel plates are separated by 539 mm a potential difference of 600 v existsbetween the platesa
a fountain designed to spray a column of water 14 m into the air has a 3 cm diameter nozzle at ground level the water
a positive lens of focal length 40 cm is placed 20 cm behind a negative lens of focal length -80 cm an object is placed
a model rocket fired vertically from the ground ascends with avertical acceleration of 36 ms2 for 50 s its fuel is then
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