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a 95-kg fullback running at 82 ms collides in midairwith a 128-kg defensive tackle moving in the opposite directionboth
a stone is dropped from rest into a well the sound of thesplash is heard exactly 220 s later find the depth of the well
the ph of a solution is prepared by dissolving 030 mol of the weak acid ha in enough water to make 10 liter of solution
reaction of 1-methylcyclopentene above with hbr might in principle lead to a mixture of two alkyl bromide addition
sucrose c12h22o11 is a nonelectrolyte hypochlorous acid hclo is a weak electrolyte and nitric acid hno3 is a strong
a 22 mlong glass tube that is closed at one end is weighted and loweredto the bottom of a freshwater lake when the tube
two parallel inducting wires each carry a current of 50a theforce per unit length between these wires is equal to the
a traveling wave in a string of linear 001kg per meter isdescribed by the wave function y002m sin50radm x -
a cloud bank moving across the ocean at an altitude of 2000m encounters a coastal mountain range as it rises to a
the atmosphere slowly oxidizes hydrocarbons in a number of steps that eventually convert the hydrocarbon into carbon
predict whether the following salts will be acidic basic or neutral when dissolved in water and answer why if the
the average density of a fish can be found by first weighingit in air and then finding the apparent weight of the fish
a student measures the volume of water in a beaker with the smallest divisions of 10 ml as 73 ml a second student pours
a 20 g block of aluminum is at 370 degrees c after 1130calories have been transferred to it what was the original
one mole of an ideal gas expands reversibly and adiabatically from an initial temperature of 350 degrees c and a volume
an isolated container holding 30 g of hydrogen gas is at 25degrees c if 1000 calories were transferred to the gas what
given that the enthalpy of vaporization for water at its normal boiling point is 4069 kjmol calculate q w and delta u
describe 4 experimental factor that can influence the retention time of analytes in glc discuss how changing each
gamma rays gamma rays are high-energy photons in acertain nuclear reaction a gamma ray of energy 511 mev
a compound contains only c h n and o a 1279g sample was burned to give 160 co2 and 77g h2o a separately weighed 1625g
a an ideal gas occupies a volumeof 20 cm3 at 20degc andatmospheric pressure determine the number of molecules of gas
the activation energy for a reaction is 376 kj mol the rate constant for the reaction is 54 x 103 at 45 degrees celcius
an object is 12cm to the left of a lens with f20cm a secondlens with f4cms is 2cms to the right of the first lens find
a a microscpe objective with a 5 mm focal length is used toproject the image of an illuminated object 01mm high onto a
a board lies on top of two uniform cylinders with i mr22 which lie on a fixed plane inclined at angletheta the board