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an astronaut travels to the nearest start system 10 light years away and returns at a speed of 05c how much has the
the wavelength of a spectral line measured to he lambda on i earth is found to increase by 50 on a far distant galaxy
an appliance mover is pulling a 300 lb stove across the floor by placing it on a piece of carpet and pulling at a 45
suppose that a point p in space-time with coordinates x x x4 lies inside the backward light cone as measured in a
a bar magnet is oriented with its magnetic dipole moment at 507deg to the direction of a 00983-t magnetic field causing
an electron enters a region of space containing a uniform 00000125-t magnetic field its speed is 195 ms and it enters
a playground merry-go-round of radius 19 m has a moment of inertia 272 kgm2 and is rotating at 6 revmin about a
in the circuit of a radio receiver a 540 f capacitor is connected in series with a 120 mh inductor and a resistance of
a 1252 carton is pulled up a frictionless baggage ramp inclined at 310 above the horizontal by a rope exerting a 752
determine the temperature at which the resistance ofatungstenwire will bethree timesits value at 20degc assume its
a charged particle moves in a uniform magnetic field of 0727 t with a period of 857 times 10-6 s find its
a certain waffle iron is rated at103kw when connected to a 120-v sourcea what current does the waffle iron carryab what
a charged particle is injected at 135 ms into a 00713-t uniform magnetic magnetic field perpendicularly to the field
a proton moves through a magnetic field at 203 of the speed of light at a location where the field has a magnitude of
a lightbulb has a resistance of 230when operating with a potential difference of 180v across it what is the current in
a proton beam in an accelerator carries a current of 115microa if the beam is incident on a target how many protons
a ball is thrown straight upward and returns to the throwers hand after 250 s in the air a second ball is thrown at an
a280-kg block is initially at rest on a horizontal surface a horizontal force of 760n is required to set the block in
a hockey puck moving at 0473 ms collides elastically with another puck that was at rest the pucks have equal mass the
a block of wood of mass 0938 kg is initially at rest a bullet of mass 00492 kg traveling at 107 ms strikes the block
a rifle has a mass of 538 kg and it fires a bullet of mass 120 g at a muzzle speed of 827 ms what is the recoil speed
a home run is hit in such a way that the baseball just clears a wall 21 m high located 130 m from home plate the ball
a ball having a mass of 2 kilograms starting at ground level is shot straight up into the air it reaches a height of 10
a daredevil decides to jump a canyon its walls are equally high and 10 m apart he takes off by driving a motorcycle up
a force of 735n stretches a certain spring a distance of 0120m what is the potential energy of the spring when a mass