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a 2543 g sample of a substance is initially at 259 degc after absorbing 1137 j of heat the temperature of the substance
tasha has mass 20kg and wants to use a 40m board of mass 10kgas a seesaw her friends are busy so tasha seesaws by
automobile airbags contain solid sodium azide nan3 that reacts to produce nitrogen gas when heated thus inflating the
a wheel radius020m is mounted on a frictionless horizontalaxisa light cord wrapped around the wheel supports a050kg
a person is riding a bicycle the wheels of a bicycle have anangular velocity of 220 rads then the brakes are applied
the dissociation constant kd of a 11 ligand l protein p complex is 20x10-6 calculate the fractional concentration y at
in the sn1 reaction of 2-methyl-2-butanol with hcl to prepare 2-chloro-2-methlybutane t-amyl chloride what are the side
a 300 kg object connected to spring with a force constant of 500 nm oscillates on frictionless horizontal surface if
baking powder is made up of sodium hydrogen carbonate and calcium hydrogen phosphate when baking powder is wet these
an aluminum rod is 185 cm long at20degc and has a mass of 350 g if 10500j of energy is added to the rod by heat what is
use the equation ph pka log conjugate baseacid to derive an expression showing the fraction of acid f in terms of its
an earth satellite moves in a circular orbit610 km above the earths surface the period of the motion is 967mina what is
assume you have a material in which an equal number of electrons and holes are available to transport charge if the
a railroad car with a mass of 50 105-kgcollides with a stationary railroad car of equal massafter the collision the
the gasoline tank of an automobile contains 83 kg of gasoline the gasoline combines with 3320 kg of oxygen what is the
a 590 kg cheerleader uses an oil-filled hydraulic lift to holdfour 130 kg football players at a height of 120 m if her
a layer of ice has formed on a shallow pond the air just above theice is at -521 degc the water-ice interface is at 0
a certain type of radio antenna is called a quaterwavelength antenna because its length is equal to one quarter of the
an inductor with l 30 mh isconnected in parallel with a capacitor with c 85 microfa if they are connected to an ac
one end of a steel youngs modulus of 20x1011 mm2 rod of radius r95mm and length l81cm is held in a vice a force of
two answers are required for this problema proton is accelerated through apotential difference of 1000 v after leaving
together two students exert a force of 825n in pushing a car a distance of 35 m how much work do the students do on the
a race car has a mass of 706 kg itstarts from rest and travels 420 m in30 s the car is uniformly accelerated during the
a 11 cm long animal tendon was foundto stretch 39 mm by a force of138 n the tendon was approximately roundwith an
when heated a 83 g sample of ammonium perchlorate nh4clo4 ignites and burns in the absence of any other material to