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a vertical cylinder of cross-sectional are a 0050m2 is fitted by a tight-fitting frictionless piston of mass 50 kg if
a car travels at an average speed of 880 kmh for 100 h and then at an average speed of 404 kmh during a second hour
an elevator is initially moving upward at a speed of 1164 ms the elevator experiences a constant downward acceleration
a subatomic particle moves during the laboratory at 085 laboratory experimenters measure its lifetime from creation to
a three-way 240 v lamp bulb that contains two filaments is rated for 200-400-600 w one filament burns out afterward the
a 134 komega resistor and a capacitor are linked in series and then a 120 v potential dissimilarity is suddenly applied
an eagle with a wing span of 20m flies due north at 80ms in a region where the vertical component of the earthrsquos
a 200 g ball attached to a spring by spring constant 270 nm oscillates horizontally on afriction less table its
the owner of a van installs a rear-window lens that has a focal length of -0302 m when the owner looks out through the
the drawing shows a rectangular block of glass n 152 surrounded with liquid carbon disulfide n 163 a ray of light is
a person working on the transmission of a car fortuitously drops a bolt into a tray of oil the oil is 532 cm deep the
the drawing shows a coin resting on the bottom of a beaker filled by an unknown liquid a ray of light from the coin
a 20 kg piece of ice at 0oc is placed outside to melt after 4 hours the ice is gone and no water remains how much heat
an object is attached to the lower end of a 100-coil spring that is hanging from the ceiling the spring stretches with
why is the following situation impossible a skater glides along a circular path she defines a certain point on the
a 191 kg box initially at rest is pushed 726 m along a rough horizontal floor by a constant applied horizontal force of
at an instant when a soccer ball is in contact by the foot of a player kicking it the horizontal or x component of the
a ladybug starts at the center of a 160 rm in-diameter turntable and crawls in a straight radial line to the edge while
a rock is dropped from a sea cliff and the sound of it striking the ocean is heard 38 s later if the speed of sound is
a singly charged positive ion has a mass of 320 multiplied by 10-26 kg after being accelerated from rest through a
suppose that the earth is a uniform sphere and that its path around the sun is circulara compute the kinetic energy
a 6600-cmnbspguitar string under a tensionnbspguitar string under a tensionnbspof 7000 n has a mass per unit length of
two pieces of steel wire with identical cross sections have lengths of l and 3l the wires are each fixed at both ends
setting a world record in a 100 m race maggie and judy cross the finish line in a dead heat both taking 90 s
two trains on separate tracks move toward one another train 1 has a speed of 100 kmh train 2 a speed of 600 kmh train 2