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a certain light-bulb has a tungsten filament it has a power of 100 w when attached to 120 v potential differencea
a ballistic pendulum consists of a bullet mb01kg fired at a small wooden block mw05kg attached to a string 25cm long
in a pet scan an electron and positron annihilate each other creating two massless photons if the positron and
as a rocket passes your space station it emits a flash of light later it emits a second flash which you determine was
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a 54 m-long rod of constant diameter 46 mm is made of 20 m of copper and the remainder of aluminum see above if the
a huge space cruiser passes earth at speed c2 it launches a small fighter ship away from earth thank goodness at speed
a 10-kg block of ice at -5ordmc is dropped into a 55-gallon barrel of water at 80ordmf what is the final state of the
alpha centauri is 43 light years away if we could make a rocket that went 45 the speed of lighta how long would we
a metal ball of mass 022 kg with initial temperature of 95ordmc is dropped into a container of 050 kg of water at
a sinusoidal electromagnetic wave having a magnetic field of amplitude 125mu rm t and a wavelength of 432rm nm is
a long solenoid of length 70 x 10-2 meters and cross-sectional area of 40 x 10-5 meters2 contains 6200 turns per metera
a solenoid has a diameter d 15 cm length l 300 cm and 440 turnsa find the inductance of the solenoidinductance 143
water at 207degc is sprayed onto 0193 kg of molten gold at 1063degc its melting point the water boils away forming
you send a beam of light from a material with index of refraction 121 into an unkown material in order to help identify
consider 500 mol of liquid watera what volume is occupied by this amount of water the molar mass of water is 180
an electron enters a region of space containing a uniform 00000217-t magnetic field its speed is 189 ms and it enters
a 120 resistor is made from a coil of copper wire whose total mass is 200what is the diameter of the wirehow long is
soles of boots that are designed to protect workers from electric shock are rated to pass a maximum rms current of 15ma
a heat engine absorbs qh 3385 j of heat from a reservoir at th 650ordmc and rejects qc 2660 j to a reservoir at th
four gram-moles of an ideal monatomic gas initially at temperature 300 k is compressed adiabatically from a volume of
two and one-half kg of ice at temperature t 0ordmc is melted into water at the same temperature by placing it in
one gram-mole of an ideal gas initially occupies v1 50 l at p1 117 kpa and then expands to v2 100 l at constant
the eyepiece of a compound microscope has a focal length of 260 cm and the objective lens has 0760 cm if an object is
there is strong evidence that the center of the milky way galaxy contains a giant black hole with a mass of perhaps one