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a neutron star is composed of neutrons and has a densitythat is approximately the same as that of a nucleus what is the
a beam contains 89x106 doubly charged positiveions per cubic centimeter all of which are moving north with aspeed of
a 100 g ball of claytraveling east at 550 mscollides and sticks together with a 600 g ball of claytraveling north at
a 18 m long solenoid is 15 cm in diameterand consists of 2010 turns of wire the current in the solenoid is increasing
a starship moving toward earth with a speed of 080 c launches ashuttle craft in the forward direction the shuttle which
stan raises a 1200-n piano a distance of 500 m using a set ofpulleys stan pulls in 200 m of ropea how much effort force
a diatomic gas has a volume of 2m3 pressure of 200 kpa and atemperature of 50 degrees celsius the gas expands
a wheel rolls 5 revolutions on a horizontal surface withoutslipping if the center of the wheel moves 32 m what is the
how is the direction of an electric field
a merry go round accelerating uniformly from rest achieves thespeed of 25 rpm in 5 revolutions what is the magnitude of
the owner of a van installs a rear-window lens that has a focallength of -0299 m when the owner looks out through the
a centrifuge in a medical laboratory rotates at an angularspeed of 3600 revmin when switched off it rotates 50
a baseball player hits a baseball m14kg the ball is initiallytraveling horizontally with a speed of 40 ms the batter
a potential difference v is applied to a wire of cross-section area of 1 unit length 1 unit and conductivitysigma you
a jogger on a circular track that has a radius of 0250 km runs adistance of 100 km what angular distance does the
a wooden board is 20 m long and has a mass of 10 kg thisboard is supported at each end by cement blocks a and b
a closed hollow sphere of radius r600cm the surface area of asphere of radius r is 4pir2 is made of styrofoam
an asteroid of mass 100 x 109 kg comes from deep space and fallstoward earth assume the asteroid started the fall from
assume that the protons in a hot ball of protons each have akinetic energy equal to kt where k is theboltzmann constant
determine the velocity as a function if time for a raindrop of mass m 4x10-6 kg that reaches a terminal velocity ofvt
an object is 794 cm from the surface of a reflective spherical christmas-tree ornament 78 cm in diameterwhat is the
a diver shines a flashlight upward from beneath the water ata 380circ angle to the vertical at what angle does the
an engine moves a boat throughthe water at a constant speed of 15 ms theengine must exert a force of 60 kn to balance
a constant horizontal force f of magnitude 20 n is applied to awheel of mass 20 kg and radius 05 m the wheel rolls
a 12 g bullet moving horizontally strikes and remains in a 30 kg block initially at rest on the edge of table the