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a cube of ice is taken from the freezer at -85degc and placed in a 97 g aluminum calorimeter filled with 292 g of water
a hummingbird is flying in such a way that it is initially moving vertically with a speed of 44 ms and accelerating
optimus prime is flying straight up at 44 ms when he accidentally drops his mega-ray blaster and it falls 65 m to the
vector a has a magnitude of 33 and is pointing at an angle a73deg east of north vector b has a magnitude of 18 and is
a solid block is suspended from a spring scale the reading on the scale when the block is completely immersed in water
a standing wave of 625 hz is produced on a string that is 133 m long and fixed on both ends if the speed of waves on
a higgs boson particle can be created by colliding protons and anti-protons each with a mass of m if the higgs boson
calculate the gyrofrequency of an electron in earths magnetic field having a value of 35 a-m-1 determine the electron
a coil has resistance r8ohms and inductance l5millihenries and is powered by a generator with variable frequency and
three moles of an ideal gas undergo a reversible isothermal compression at 215degc during this compression 1870 j of
you make tea with 0375 kg of 946degc water and let it cool to room temperature 200degc before drinking ita calculate
a carnot heat engine has a thermal efficiency of 0615 and the temperature of its hot reservoir is 775 k if 2375 j of
a carnot engine whose high-temperature reservoir is at 580 k takes in 520 j of heat at this temperature in each cycle
a refrigerator has a coefficient of performance of 210 each cycle it absorbs 340 104 j of heat from the cold reservoira
a diesel engine performs 2090 j of mechanical work and discards 4125 j of heat each cyclea how much heat must be
write down the wave function for the ground state of an electron in a hydrogen atom in spherical coordinates what are n
a concave cosmetic mirror has a focal length of 24 cm a 50 cm -long mascara brush is held upright 12 cm from the
a large aquarium of height 598 m is filled with fresh water to a depth of d 240 m one wall of the aquarium consists of
a radio tuner is built by connecting an l041mh inductor and variable capacitor in series with an antenna the driving
a coil has resistance r14ohms and inductance l3millihenries and is powered by a generator with variable frequency and
a potential difference of 12 v is placed across the ends of a wire of resistance 2625times10-3 ohm if the density of
an air-filled capacitor is formed from two long conducting cylindrical shells that are coaxial and have radii of and
on a hot summer day the temperature of air in arizona reaches 113degf what is the speed of sound in air at this
an antenna radiates with ux01 for -1ltxlt1 and ux00 for all other x values on the x-axis the frequency f is 60 hz write
the half life for the alpha decay of uranium 238 is 447x109 yrs old determine the age in years of the rock specimen