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a worker stands still on a roof sloped at an angle of 36 degrees above the horizontal he is prevented from slipping by
after integrating the electric field for the entire rod why didthe radius go from r2 to r and why does the product
the speed of an alpha particle is determined to be345times106 ms if all of its kinetic energy isacquired by passing
because earths rotation is gradually slowing the length ofeach day increases the day at the end of 10 century is 10
the tires of a car make 75 revolutions asthe car reduces its speed uniformly from 100 kmh to 50 kmh thetires have a
a 145-g ball was thrown into the air at an initial velocity of16 ms assume the ball started at ground level the ball
two particles are fixed to an x axis particle 1 ofcharge -752 x 10-7 c is at the origin and particle 2 ofcharge 752 x
a 3 x 102 kg piano is being lifted at a steady speed from groundlevel straight up to an apartment 100 m above the
a man observes snow falling vertically when he is at rest but whenhe runs through the falling snow at a speed of 680 ms
a movig particle encounters an external electric field that decreases its kinetic energy from 9510 ev to 6610 ev as
how large a pressure in pascals would be required to compress water by 10 percent how high a column of water in
four identical charges 40 microceach are brought from infinity and fixed to a straight line thecharges are located 020
a spectral line of sodium normally has a wavelength of 5890angstroms the same line measured in the spectrum of a star
a model rocket blasts off and moves upward with anacceleration of 12ms2 until it reaches a height of 27m at whichpoint
four point charges have the same magnitude of 22 x10-12 c and are fixed to the corners of a square that is83 cm on a
four charges with equal magnitudes of 111 x 10-14 care placed at the corners of a rectangle the lengths of the sides of
a charge of -300 microc is fixed at the center of a compass twoadditional charges are fixed on the circle of the
two tiny conducting spheres are identical and carry charges of-200 microc and 500 microc they are separated by a
a boy whirls a stone in a horizontal circle 16m above the groundby means of a string 14m long the angle between the
the figure shows a closed gaussian surface in the shape of a cubeof edge length 27 m with one cornerat x1 46my1 45 m
ted is sitting in his lawn chair when stella flies directly overhead going southeast at 1145 ms five seconds later a
a horizontal block and spring system with negligible friction is initially in equilibrium the mass of the block is 0160
a spaceship moves radially away from earth with acceleration32 ms2 how long does it takefor the sodium streetlamps
a car makes a trip due north for three-fourths of the time and duesouth one-fourth of the time the average northward
some forms of cancer can be treated using proton therapy in which proton beams are accelerated to high energies then