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the filament of anincandescent lightbulb is a thin tungsten wire suppose a lightbulbhas a resistance of 42 omega at
two metal spheres each of radius 25 cm have a center-to-center separation of 26 m sphere 1 has a charge of 14 x10-8 c
a sun yacht is a spacecraft with a large sail that is pushed by sunlight although such a push is tiny in everyday
a golf ball of mass 450 x 10-2kg is struck by a club contact lasts 239 x 10-4 s and theball leaves the tee with a
a coil is wrapped with 195 turns of wire on the perimeter of a square frame of sides 169 cm each turn has the same area
a circular wire loop of radius 81 m lies in a plane perpendicularto a uniform magnetic field of magnitude 04 t in 01 s
the drawing shows a type of flow meter that can be used to measure the speed of blood in situations when a blood vessel
a block is sent up a frictionless ramp along which an xaxis extends upward the figure below gives the kinetic energy
in the bohr model of the hydrogen atom an electron mass 9110-31kg orbits a proton at a distance of 5310-11 m the
you are asked to construct a capacitor having a capacitance near 1nf and a breakdown potential in excess of 10000 v you
the crankshaft in a race car goes from rest to 3000 rpm in 20seconds1 what is the crankshafts angular acceleration2 how
a man pushes a 20 kg broom at a constant speed across the floorthe broom handle makes a 50 degree angle with the floor
a 700 kg box is pulled by a 500n force at an angle of 30degrees to the horizontal the friction is 300 na write the
an ac generator produces a sinusoidal voltage at 60 hz with amaximum of 120 va what is the average voltageb what is the
a 400 kg steel ball is thrown upward from the leaning tower ofpisa with an initial speed of 490 ms the tower is 55m
the electrical power supplied to a device is 120 v at 60 hz thedevice requires 200 v and draws 25a an ideal transformer
a manufacturing plant discovers that its electrical load due to the large numbers of motors is largely an inductive
two idenical wavelengths lambda 400 meters are emitted from separate sounces at a certain obsevation point the
a 1500 kg artificial satellite will appear to be stationary to anobserver on earth if its period is exactly equal to
a 650 kg diver is 350 m above the water falling at speed of 640ms calculate her kinetic energy as she hits the water
if you fire a cannonball straight upward with a startingspeed of 20ms how high does it go and how long will it be in
an ateroid in an elliptical orbit about the sun travels at 36 x 106 ms at perihelion the point of closest approach at a
a 0135 kg ball is thrown straight up from 220 m above the groundits initial vertical speed is 960 ms a short time later
referring to a baggage carousel at an airport your suitcase has not slid all the way down the slope and is going around
a circular coil 980 turns radius 0043 m is rotating in auniform magnetic field at t 0 s the normal to the coilis