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a 42 gram feather falls with a constant speed of 12 ms what is the force of air resistance on the
an object is placed 25 cm in front of a lens of focal length 20 cm 60 cm past the first lens is a second lens of focal
for each of the situations described below the object considered is undergoing some changes among the possible changes
consider a material that consists of 10 bins to put energy in its degrees of freedom and 5 chunks of energya calculate
a 0145 kg ball moving in the x direction at11ms is hit by a bat the balls final velocity is 20 ms in the -x direction
find the speed of the approaching smaller fish before luncha 48-kgfish swimming 060ms swallows an absentminded
on the periodic table there are two numbers in the block for the element potassium k 19 and 39098 what are the names of
a 100-w 120-vlightbulb has a resistance of 14omegawhen cold 20c and 150omegawhen on hotpart a calculate its power
a small city requires about 15mwof power suppose that instead of using high-voltage lines to supply the power the power
a heater coil connected to 240-vrmsac line has a resistance of39omegapart a what is the average power usedpart b what
a 150-mlength of wire consists of 60mof copper followed by 90mof aluminum both of diameter13mma voltage difference of
a potential difference of 300 v is applied to a series connection of two capacitors of capacitances c1200 microfarad
you and your friends are playing soccer your friend kicks a soccer ball at 8ms toward you instead of kicking it like
1 you are playing with carts in lab while your lab instructor isnt looking you carefully attach a spring-loaded plunger
a roofing tile slides down a roof and falls off the roof edge 10m above the ground at a speed of 6ms the roof makes an
1 what is the efficiency of a subject on a treadmill who puts out work at the rate of 105 w while consuming oxygen at
calculate the viscosity of a fluid that would allow a pressure drop of 35 kpa over a 5 mlength of 075-in stainless
the potential in a region between x 0 and x 100 m is v b mx where b 200 v and m -600 vm find a the potential at x
over a certain region of space the electric potential is v 5x - 3x2y 2yz2 find a an expression for the electric field
a proton has an initial speed of 32times105msnbspwhat potential difference is required to bring the proton to
an insulating solid sphere of radius r has a non-uniform charge density that varies with r according to the expression
a 80-nf capacitor with an initial charge of 10 mc is discharged through a 5-komega resistora calculate the current in
what is the fractional change in the resistance of an iron filament when its temperature changes from 0oc to 100oca 20
what is the density of the applewood if a piece of 10cm3 of applewood has a mass of
1 express the following angles in radians a 450degb 600degc 900degd 3600dege 445deggive as numerical values and as