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the pull cord of a lawnmower engine is wound around a drum ofradius 600 cm while the cord is pulled with a force of 75
a 10 kg book initially at rest falls from a height of 15 mto the floora does the gravitational potential energy at the
consider two bobs of equal mass but different size both tied tothe same length of string the first is a sphere the
a student finds a shiny gold-covered rock and decides to determine if it is gold she first determines that the mass of
a two capacitors of 26muf and 444 muf are connected in parallel and charged with a150 v power supply find the total
a mechanic turns a wrench using a force of 25 n at a distance of 16cm from the rotation axis the force is perpendicular
in the molecular structure of maleic acid and fumaric acid there are four h atoms however the compounds are diprotic
nichrome wire of cross-sectional radius 0791 mm is to be used inwinding a heating coil if the coil must carry a current
a 1105 kg automobile is pulled by horizontal tow line with a net force of 816 n what is the acceleration of the auto
the vibrational transition for h35cl occurs at 28856 cm-1 if d35cl has the same force constant where would the
a chick farmer decides to increase the size of her flock from500 chickens to 2000 chickens she must relieve her
you are working as a consultant on a video game designing abomb site for a world war i airplane in this game he
in spectrophotometry what is the theorywhy is there a linear relationship between i absorbance and concetration and ii
a 200-g block of copper at a temperature of 90 degreescelsius is dropped into 400 g of water at 27 degrees celsius the
a galvanonmeter has an internal resistance of 100 omega and deflects full-scale at 200 ma what size resistor should be
what is the the concentration of each ion present in the solution formed by mixing 390 g kcl in 750 ml of 0280 m cacl2
a fan turns at a rate of 900 rpm ie revmina find the angular speed of any point on one of the fan bladesb find the
a weather balloon has a volume of 750 l when filled with helium at 8 degrees c at a pressure of 380 torr what is the
a sled which has amass of m125kg is sitting on an icyhorizontal surface a rope attached to the front end of the
a vacuum cleaner is plugged into a 1200-v socket and uses 44 a ofcurrent in normal operation when the back emf
a sce and an indicator electrode were connected to a voltmeter all conditions were standard the observed cell emf at 25
the chemical 5-amino-23-dihydro-14-phthalazinedione better known as luminol is used by forensic scientists in analyzing
a pulley of 50cm radius on a motor is turning at 30 revsand slows down uniformly to 20 revs in 20s calculatea the
two resistors r1100 ohms and r2 200 ohms are connected inparallel across a battery the current through r1 is 0150
a 3000-kg spacecraft is in a circularorbit 1200 km above the surfaceof mars how much work must the spacecraft engines