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a wall is constructed of a 2 inch layer of fiberglass board r 8 and six inches of fiberglass batting r 19 if the
a 2kg box slides along a frictionless surface with a speed of 15ms and approaches a horizontal spring with a spring
the drawing shows three identical rods a b and c moving in different planes a constant magnetic field of magnitude 450
a series rcl circuit contains a 30-mh inductor 120-f capacitor and 150- resistor the rms voltage of the generator is
the long straight wire carries a current of 30 a a particle has a charge of 65x10-6 c and is moving parallel to the
an ac generator has 100 rectangular loops on its armature each loop is 11 cm long and 6 cm wide the armature rotates at
six identical books 4cm thick and 8kg mass all lie flat on a tablea how much work is needed to stack all the books
a series circuit has a peak voltage of 114 and a peak current of 3 if the current lags the voltage by 42 what is the
a 966 times 1014 hz electromagnetic wave propagates in carbon tetrachloride with a speed of 205 times 108 ms the
a person pushes a crate rightward along a rough horizontal surface by pushing downward at 30 degrees below the
a thin double convex lens is to focus the image of an object onto a screen so that the image is life-sized the lens has
a ferris wheel is moving at an initial angular velocity of 10 rev54 s if the operator then brings it to a stop in 34
a proton moves perpendicular to a uniform magnetic field at a speed of 140 107 ms and experiences an acceleration of
a spring is hung from the ceiling a 0430 -kg block is then attached to the free end of the spring when released from
a mass spectrometer is used to examine the isotopes of uranium ions in the beam emerge from the velocity selector at a
a 851-kg car stopped at an intersection is rear-ended by a 1760-kg truck moving with a speed of 175 ms if the car was
a carnot cycle heat engine uses steam as the working fluid and has a thermal efficiency of 20 heat is transferred to
a 200-turn rectangular coil having dimensions of 30 cm by 60 cm is placed in a uniform magnetic field of magnitude 098
a person with a mass of 50 kg jumps vertically with an initial velocity of 2 ms assuming there is no vertical forces
a horizontal power line of length 43 m carries a current of 13 ka earths magnetic field at this location has a
a crate of mass 98 kg is pulled up a rough incline with an initial speed of 146 ms the pulling force is 108 n parallel
a flat coil enclosing an area of 007 m2 is rotating at 56 revs with its axis of rotation perpendicular to a 017 t
two blocks of weights 240 and 500 n are connected by as massless string and slide down an inclined plane making an
a sledge loaded with bricks has a total mass of 190kg and is pulled at constant speed by a rope inclined at 204 degrees
an upright object is placed a distance in front of a converging lens equal to twice the focal length f1 of the lens on