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a ball of mass 50 kg is lifted off the floor a distance of 17 m what is the change in gravitational potential energy
a 499 g air-track glider attached to a spring withspring constant 134 nm is sitting at rest on a frictionless airtrack
a human being can be electrocuted if a current as small as 51 ma passes near the heart an electrician working with
if the rms speed of the molecules in an ideal gas at 20 degrees c increase by a factor of 2 what is the new
a 735 n man stands in the middle of afrozen pond of radius 50 m he isunable to get to the other side because of a lack
a wire is 13 m long and 093 mm2 in cross-sectional area it carries a current of 57 a when a 30 v potential difference
a vessel at rest explodes breaking into three pieces twopieces having equal mass fly off perpendicular to one
you are at the controls of a particle accelerator sending a beamof 260 multiplied by107 ms protons mass m at a gas
a 262-kg dog is running northward at 289 ms while a 530-kg cat is running eastward at277 ms their 840-kg owner has the
a 355 g mass is attached to a spring k425nm if system is allowed to oscillate on frictionless surface what is period
two identical point charges are fixed to diagonally opposite corners of a square that is 0500 m on a side each charge
old naval ships fired 15 kg cannon balls from a 210kg cannon it was very important to stop the recoil of thecannon
when the handle on a car jack moves 60 cm the 10000 n carmoves upward 12 cm there is no friction finda the work doneon
a positively charged particle of mass 6210-8 kg is traveling north with a speed of 61 msand enters a 033 t uniform
a mass attached to the free end of a spring executes simpleharmonic motion according to the equation y 036 m sin 83
a 1300 kg cannon which fires a 80 kg shellwith a speed of 526 ms relative to the muzzle is set atan elevation angle of
a concave mirror produces a real image that is three times aslarge as the objectif the object is 22 cm in frontof the
unpolarized light passes through two polaroid sheets thetransmission axis of the analyzer makes an angle of 201deg with
an insulated sphere has a uniform volume charge densityrho and ra what is the magnitude of the electric field in all
a 500-kg box is being pushed along a horizontal surface by a forceof 250 n directed 340deg below the horizontal the
a 30-kg and a 50-kg box rest side-by-side on a smooth leveloor a horizontal force of 32 n is applied to the 30-kg box
an evacuated spherical diving bell containing a camera is in theocean at a depth of 135 m it has a flat transparent
you are 19 m tall andstand 34 m from a planemirror that extends vertically upward from the floor on the floor 16 m in
shavingmakeup mirrors typically have one flat and one concavemagnifying surface you find that you can project a
a 1000kg car moving at 40mph hits a 750 kg parked car if they move off locked together after the collision how fast are