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the attractive electrostatic force between thepoint charges844106 c and q has a magnitude of 0975 n when the
the electric field at the surface of a charged solid coppersphere with radius 0210 m is3380 nc directed toward the
a 75kg skier rides a 2830m long lift to the top of amountain the lift makes an angle of 146 degrees with thehorizontal
a cyclist approaches the bottom of a gradual hill at a speedof 11 ms the hill is 50m high and the cyclist estimatesthat
a scuba diver has her lungsfilled to half capacity 2 l when she is 12 m below thesurface the acceleration of gravity is
calculate how much work is done when 5 moles of an ideal gas at27ordmc expand is othermally from an initial volume of 1
light of wavelength 480 nm in air falls ontwo slits 6 10-2 mm apart the slits are immersed inwater as is a viewing
an iron ball is suspended by a thread of negligible mass from an upright cylinder that floats partially submerged in
while on the surface of the planet mars a mass of 1 kginitially at rest falls a height of 1m onto a spring the spring
an artillery shell is fired with an initialvelocity of 300 ms at 520deg above the horizontal to clear an avalanche
a tuning fork with a frequency of 440 hz is held above a resonance tube that is partially filled with water assuming
what effect does the magnetic field have on the speed of the particlewhat are the magnitude of the acceleration of the
a steel cable is to support an elevator whose total loadedmass is not to exceed 2900 kg if themaximum acceleration of
two automobiles each of mass 1000 kg are moving at the same speed 20 ms when they collide and stick togethernbsp in
an iron bolt is used to connect two iron plates together thebolt must withstand shear forces up to about 3150 n
a 72 kg person has an apparentmass of 45 kg because of buoyancywhen standing in water that comes up to the hips
the helicopter in the drawing is moving horizontally to theright at a constant velocity the weight of the helicopter
the speed of a bobsled is increasing because it has an accelerationof 24 ms2 at a given instant in time the
two spectators at a soccer game in montjuic stadium see and a moment later hear the ball being kicked on the playing
in a certain radio wave the shortest distance between positions where the electric and magnetic fields are zero is 098
a 520 g charcoal sample from anancient fire pit has a 14c activity of 630disintegrationsmin a living tree has a 14c
in 1976 kitty hambleton of the united states drove a rocket-enginecar to a maximum speed of 965 kmh suppose kitty
a 45-cm-tall object is placed 28 cm in frontof a spherical mirror it is desired to produce a virtual imagethat is
an electron traveling north enters a region where the electric field is uniform and points west the
bats emit sounds of frequencies around 350 khz and use echolocation to find their prey if a bat is moving at the speed