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if a 100 cm3 solid cube of alumina ceramic initially at 300 c is placed in 50 ml of h2o initially at 25c in a closed
a 47 efficient device uses chemical energy to generate 550j of electric energyhow much chemical energy is useda
calculate the mass of cuso4h2o needed to prepare 30 g of cunh34so4h2o assuming a 90
if a single pane glass window on a house has an area of 05 m2 and is 3mm thick what is rate of heat loss through this
a certain gyroscope consists of a uniform disk with a 52 cm radius mounted at the center of an axle that is 12 cm long
kevlar is a strong synthetic fiber used in bullet proof vests and body armor kevlar is made by the condensation
a 230-microf capacitor and a 40m h inductor are in series with a 345 o resistor1 what is the resonant frequency2 what
a student failed to standardize his naoh solution with khp instead he calculated the naoh solution concentration from
for each of the following identify the bronsted-lowry acid the bronsted-lowry base the conjugate acid and the conjugate
a a very powerful vacuum cleaner has a hose 300 cm in diameter with the end of the hose placed perpendicularly on the
an artificial satellite circles the earth in a circular orbit at a location where the acceleration due to gravity is
a series of caffeine standards ranging from 40-200 mgl will be used to prepare a calibration curve for an hplc analysis
a 020 kg billiard ball is thrown at a 45 degree angle upwards from the edge of a 12192 meters tall building the ball
a cyclist pedals a bicycle the driving wheel accelerates from the rest to an angular speed of 64 revs in 38
a suspected case of ingestion of the organophosphate malathion has entered the emergency room a stat pseudo
the beta blocker drug thimolol is expected to reduce the need for heart bypass surgery its composition by mass is 494c
a solution contains some or all of the ions cu2 al3 k ca2ba2pb2 and nh4 the following tests were performed in order on
two point objects both having mass m are placed at positions 0ym0 and 0-ym0 in the 2d cartesian coordinate system and
which of the following statements are correct 1 for gas phase equilibria the partial pressures of reactants and
the pressure on 200 g of nickel is increased from zero pressure to 500 atm calculate the work done on the material
suppose we have a solid with a constant volume consisting of n particles there are only two energy states where the
which options apply to purines and pyrimidines purines 1 contain one heterocyclic ring 2 contain two heterocylic rings
the area of a typical eardrum is about 50 times 105 m2a calculate the sound power the energy per second incident on an
a carnot heat engine has a thermal efficiency of 0510 and the temperature of its hot reservoir is 700 k if 3900 j of
a laboratory technician drops a 00840-kg sample of unknown material at a temperature of 1000degc into a calorimeter the