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a coil of length l50 cm and diameter d 5 cm consists of n 200 turns there is a current i 1 a running thru the coil
suppose that the amount of heat removed when 28 kg of water freezes at 00 oc were removed from ethyl alcohol at its
the sport of gymnastics requires both impressive physical strength and extensive training for balance the iron cross is
a 120-v motor has mechanical power output of 270 hp it is 940 efficient in converting power that it takes in by
assuming the cost of energy from the electric company is 0115kwh compute the cost per day of operating a lamp that
an airplane propeller is 195m in length from tip to tip with mass 122kg and is rotating at 2500rpmrevmin about an axis
the springs of a 134937 kg car compress 50 mm when its 68-kg driver gets into the drivers seat if the car goes over a
a certain lightbulb has a tungsten filament with a resistance of 205 when at 200degc and 136 when hot assume the
an iron wire has a cross-sectional area equal to 145 10-5 m2 carry out the following steps to determine the drift speed
if the magnitude of the drift velocity of free electrons in a copper wire is 628 10-4 ms what is the electric field in
a sinusoidal wave of wavelength 195m and amplitude of 0125m travels on a string with a speed of 112ms to the right the
a piano string having a mass per unit length equal to 502gm is under a tension of 1330n find the speed that a wave
a spherical pot of hot coffee contains 075 of liquid essentially water at an initial temperature of 99 the pot has an
if the elastic limit of steel is 50 multiplied by 108 pa determine the minimum diameter a steel wire can have if it is
suppose that when a certain sound intensity level in db quadruples the sound intensity in wm2 doubles determine this
a stainless-steel orthodontic wire is applied to a tooth as in the figure below the wire has an unstretched length of
you are making pesto for your pasta and have a cylindrical measuring cup 109 high made of ordinary glass and that is
for safety in climbing a mountaineer uses a nylon rope that is 50 m long and 10 cm in diameter when supporting a 90-kg
suppose that 15 of the volume of the average human body is contained in the head what would the average persons density
a kid balances on a pogo stick his mass combined with the mass of the pogo stick is 22kg the base of the pogo stick has
a car weighs 2415 pounds and the rocket mounted on the car provides 1500 lbs of constant thrust calculate the time
a girl let go of her 25kg hula hoop at the top of a hill the slope of the hill is 15 degrees how fast is the hula hoop
a solid spherical ball of mass 336 kg and radius 008 m rolls along a smooth level surface with a speed of 2 ms what is
sound is passing perpendicularly through an open window whose dimensions are 11 m x 075 m the sound intensity level is
what is the frequency heard by a person driving 7917 kmh toward a blowing factory whistle f 50677 hz is the air