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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
an rl circuit with l 100 h and an rc circuit with c 200 microf have the same time constanta if the two circuits have
an emf of 210 mv is induced in a499 turn coil when the current is changingat a rate of 140 as what is the magnetic flux
a child is twirling a 00148-kg ball on a string in ahorizontal circle whose radius is 0143 m the ball travels
suppose a lightwave that is linearly polarized in the plane ofincidence impinges at 30degrees on a crown-glass plate
a person going for a morning jog on the deck of a cruise ship isrunning toward the bow front of the shipat 15 rm ms
a light ray in air is incident on an air to glass interface at anangle of 45 degrees and is refracted at an angle of
two wires in figure p195 carry currents of 3a and 5a in the direction indicated out of the page a find the direction