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a radio station with a power of 20 kw sends out an omnidirectional wave at 125 mhz if the electromagnetic wave has an
a solution at ph 7 contains a weak acid ha the pka of the acid is 65 what is the ratio of a-ha note the negative next
a ball with mass 1kg is dropped from a height of 6m the ball is caught by a person 2m above the grounda how much work
draw a structure for each isomer of dimethylcyclopropane label each proton a b c etc to indicate the number of signas
an underdamped spring-mass system consists of a spring with a force constant of 200 nm and a mass of 550 g it is
two masses are separated by 385m the mass of objects are 598kg and 735 kg how far is the center of mass of the
how much heat energyin kilojoulesis required to convert 70g of ice at -180 degrees c to water at 25 degrees
a 420-g bullet embeds itself in a 200-kg block which is attached to a horizontal spring with a force constant of 950 nm
the function xaxa21-xa is an acceptable wave function for the article in the one-dimensional infinite depth of length a
a 57 kg rock with a volume of 36 l is completely submerged in water the density of water is 1 kgla what volume of water
in the picture below a 9 kg bar 15 m long is set up to rotate about its center the dark circle each arrow represents a
which of the functions sin3x 6cos4x 5x3 1x 3e-5x ln 2x are eigenfunctions of d2dx2 for each eigenfunction state the
what is the ph of a mixture of 1000 ml of 001m nah2po4 and 1000 ml of 001 m na2hpo4 please show the
an rl circuit has a 5 ko resistor and a 1 mh inductor this circuit is driven by a 100 hz sine wave with 1 v amplitude
how many grams of 97 pure naoh pellets do you need to make 1000 liter of 15
a quarter-pound hamburger with all the fixings has a mass 210g the food energy of the hamburger is 24mjwhat is the
three 150-v cells each with an internal resistance of 00500 are connected in series to form a battery with a current of
coca-cola used to contain 0060 phosohoric acid by mass determine the ph of coca-coal prior to
a sheet of glass is coated with a 500nm thick layer of oil n 142for what visible wavelengths of light do the
a cube of edge length 21 cm is positioned as shown in the figure below there is a uniform magnetic field throughout
an isolated capacitor of unknown capacitance has been charged to a potential difference of 100v when the charged
a man stands in the middle of a boat which is 41 m long and has a mass of 75 kg the end of the boat that is closest to
a car is traveling east at 14ms weighing 2000kg a car is traveling north at an unknown velocity and weighs 1500 kg upon
a block of mass 30 kg moves along a frictionless track which has a dip 07 m below the original level of the track and
an electric field exerts a force of 300 x 10 -4 n on a positive test charge of 750 x 10 -4 c find the magnitude of the