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you are trying to overhear a juicy conversation but from your distance of 240m it sounds like only an average whisper
the half life of carbon 14 is 5730 years if an archeologist finds an patially burned firewood and the carbon 14 content
you sing into a well and find that the well resonates at frequencies of 187 hz and 221 hz with no resonances between
a water storage tank is an upright cylinder of height 8 m and radius 6 m the storage tank is full of water but is
the threshold of hearing in air corresponds to a frequency of 1000 hz and an intensity of about 74 times 1013 wm2 when
suppose that a 100 cm3 box in the shape of a cube is perfectly evacuated except for a single particle of mass 123 x
you are driving a car which is heading 30 ms towards a brick wall you sound a horn which emits at a frequency of 410 hz
a 10 m long wire carrying a current of 22 a makes an angle of 37 degrees with the earths magnetic field of 051 mt what
heat is added to an open pan of water at 1000c vaporizing the water the expanding steam that results does 561 kj of
a husband buys a helium-filled anniversary balloon for his wife the balloon has a volume of 41l in the warm store at
an aluminum cylinder with radius 23cm and length 13cm is heated to 450degc find the net power this cylinder radiates
a certain animal species is equally likely to have blue eyes or brown eyes in a sample of four animals what is the
you have a 25kg copper block at room temperaturea find the energy required to raise the coppers temperature to its
if 0045kg of ice at 0deg c is added to 0250kg of water at 27deg c in a 0130kg- aluminum calorimeter cup what is the
a 500-turn circular coil with an area of 0500 m2 is mounted on a rotating frame which turns at a rate of 200 rads in
a gold prospector finds a solid rock that is composed solely of quartz and gold the mass and volume of the rock are
a student decides to move a box of books into her dormitory room by pulling on a rope attached to the box she pulls
a baking dish is removed from a hot oven and placed on a cooling rack as the dish cools down to 37deg c from 192deg c
a young male adult takes in about 50 10-4 m3 of fresh air during a normal breath fresh air contains approximately 21
a 3000 kg statue is placed on top of a cylindrical concrete y 230 1010 nm2 stand the stand has a cross-sectional area
a spherical balloon is made from a material whose mass is 300 kg the thickness of the material is negligible compared
suppose a tank contains 626 m3 of neon ne at an absolute pressure of 101 105 pa the temperature is changed from 2932 to
during an all-night cram session a student heats up a 0668 liter 0668 x 10- 3 m3 glass pyrex beaker of cold coffee
a 0450kg rock is dropped 140m into 30kg of water if all the rocks kinetic energy is converted to thermal energy in the
a 82 person sits on a 35 chair each leg of the chair makes contact with the floor in a circle that is 15 in diameter