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in each cycle of its operation a refrigerator removes 17j of heat from the inside of the refrigerator and releases 40j
a pair of slits separated by 0150 mm is illuminated by light having a wavelength of 631 nm an interference pattern is
a engineer designs a heat engine using flat-plate solar collectors the collectors deliver aeat at 70 degrees c and the
the position of a particle is given by the expression x4cos3ptp where x is in meters and t is in seconds determinea the
a pump used to move water through a tube uses a piston 15 cm in diameter which moves 20 cms what is the fluid velocity
what is the minimum area in square meters of the top surface an ice slab 0251 m thick floating on fresh water that will
a particle is moving with a certain speed its speed and momentum are being measured with respect to earth when the
a piano string is under a tension of t 778n when struck the wave has a period of t 06ms and a wavelength of 077m what
a guitar string is under a tension of t 198n the string has a mass of m 99g and length l when the string is plucked
when an ambulance is stationary the siren gives off a sound at a frequency of 500 hz in answering the following
the second-order fringe of 680 nm light is observed at an angle of 16deg when the light falls on two narrow slits how
a glass window 035 cm thick measures 81 cm by 36 cm how much heat flows through this window per minute if the inside
betaan observer that is standing 12m from a stereo sound speaker perceives the sound level from the speaker to be 60
a 080-m-long organ pipe that is open at both ends resonates in the fundamental when a tuning fork of unknown frequency
to fill a childs inflatable wading pool you use a garden hose with a diameter of 29 cm water flows from this hose with
a mortar crew is positioned near the top of a steep hill enemy forces are charging up the hill and it is necessary for
the weight of your 1205-kg car is supported equally by its four tires each inflated to a gauge pressure of 351 lbin2a
an airplane flies eastward and accelerates uniformly at one position along its path it has a velocity of 333 ms it then
a mass m10kg is oscillates between two springs kltsubgt1ltsubgt100nm and kltsubgt2ltsubgt200nm if x01m what is the
a spaceship is approaching a space station at a speed of 20 105 ms the space station has a beacon that emits green
how many electrons should be removed from an initially uncharged spherical conductor of radius 029 m to produce a
a horizontal water main with a cross-sectional area of 196 cm2 necks down to a pipe of area 404 cm2 meters mounted in
you attach a meter stick to an oak tree such that the top of the meter stick is 247 meters above the ground later an
a bar of length 2 cm slides along metal rails at a speed of 1 cms the bar and rails are in a magnectic field of 2 t
how fast would javelin normally 25 m long have to be going relative to an observer to appear 20 shorter 2 m