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during a violent thunderstorm hail the size of marbles diameter 210 cm falls at a speed of 370 ms there are estimated
a blu-ray disc has a mass of 20 g and is 12 cm in diameter the fastest drives can spin the disc at 10000 rpm after
the body in the figure is pivoted at o and two forces act on it as shown if r1 265 m r2 220 m f1 424 n f2 571 n 1
a uniform 345-kg beam of length 495 m is supported by a vertical rope located d 120 m from its left end as in the
a horizontal spring is lying on a frictionless surface one end of the spring is attaches to a wall while the other end
a spring is hung from the ceiling a 0463 -kg block is then attached to the free end of the spring when released from
a person bending forward to lift a load with his back figure a rather than with his knees can be injured by large
a uniform 19-kg rod that is 078 m long is suspended at rest from the ceiling by two springs one at each end both
a cosmic-ray proton in interstellar space has an energy of 170 mev and executes a circular orbit having a radius equal
a proton moves with a velocity of 4i 5j k ms in a region in which the magnetic field is i 2 k t what is the
a bowling ball encounters a 0760-m vertical rise on the way back to the ball rack as the drawing illustrates ignore
a stationary bicycle is raised off the ground and its front wheel m 138 kg is rotating at an angular velocity of 143
a hypodermic syringe contains a medicine with the density of water the barrel of the syringe has a cross-sectional area
a ball of mass 0190 kg has a velocity of 147 i ms a ball of mass 0305 kg has a velocity of -0392 i msthey meet in a
a wire has a length of 740 10-2 m and is used to make a circular coil of one turn there is a current of 210 a in the
a large storage tank open at the top and filled with water develops a small hole in its side at a point 158 m below the
in the figure below two semicircular arcs have radii r2 660 cm and r1 245 cm carry current i 0281 a and share the
what is the total mass of the earths atmosphere the radius of the earth is 637 106 m and atmospheric pressure at the
two acrobats each of 600 kg launch themselves together from a swing holdings hands their velocity at launch was 800 ms
a cube of wood having an edge dimension of 220 cm and a density of 650 kgm3 floats on watera what is the distance from
the solid fuel of a 300kg rocket travelling at 164x104 kmh is ignited to correct the rocket trajectory in mid-flight to
after the sun exhausts its nuclear fuel its ultimate fate may be to collapse to a white dwarf state in this state it
a frictionless ramp is constructed so that it is at a 30 degree angle to the horizontal it is 18 meters long and 09
a tennis player receives a volley with the ball 00600 kg traveling horizontally at 540 ms and returns the ball so that