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a 12 kg block of aluminum is heated to 200 c it is quickly placed in an insulated tub of water at 0 c and sealed it all
have the major tax cuts of 2001 accomplished their intended
estimate the total amount of u-235 needed to operate a 600 mwreactor for one year assuming e 40 and that each fission
assume that the orbit of the earth around the sun is circularthe distance from the earth to the sun is 15x1011 m the
a radio signal with a wavelength of 12 x10-4 m is sent to a distance asteroid isreflected and returns to earth 72 hours
a system containing an ideal gas at a constant pressure of 122 105 pa gains 2140 j of heat during the process the
suppose the space shuttle is in orbit 320km from the earths surface and circles the earth about once every909 minutes
a 30 kg mass collides and sticks to a 50 kg mass connected tothe end of a string if the masses move to a position 180
the length of a string of a pendulum is increased by a factor of9 by what factor has the period of the oscillation
consider an elastic collision in one dimension that involvesobjects of mass 25kg and 45kg the larger mass is initially
a college student went to an amusement park where they rode a ridecalled the rotor it is essentially a large hollow
a physical pendulum is constructed using a 235kg object having a moment of inertia of 27 kg-m2 aboutits center of mass
two blocks with masses m1 and m2 are released from the top of twofrictionless inclined planes of the same height making
although the altitude may vary considerably hailstones sometimes originate around 500m about 1500ft above the grounda
2m long wire is carrying a current of 2a the the wire is placed atangle 60deg with respect to magnetic field if wire
thin layer of oil n125 is on top pf puddle of water n133if normally incident 500 nm light is strongly raflected what is
a stone of mass m rests on a spring which is compressed a distanceof 1 cm by the stone the stone is pushed down an
you are moving due north on your tricycle with a velocity020ms you aee a fellow tricyclist moving with relativevelocity
a 11-kg 20-cm-diameter solid sphere is rotating about its diameter at 69 revmina what is its kinetic energyb if an
a street lamp weighs 150n it is supported by two wires thatform an angle of 120 degrees with each otherthe tensions in
while riding bumper cars at the fair bobs car collides directly with the back of joes car while both cars are moving to
a city encompasses 820km2a if an average of 2 inches of rain fell on the cityduring a summer storm how many kilograms
two capacitors one with capacitance c and a second with capacitance c3 are connected in parallel a battery is placed
a storage tank 25m high is filled with gasolinea find the gauge pressure at the bottom of the tankb calculate the force
a piece of concrete measures 3 ft by 3 ft by 125 fta whatis its weightb find the buoyant force that acts on it when it