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a garden hose of inner radius 05 cm carries water at 20 ms the nozzle at the end has radius 020 cm how fast does the
two window washers bob and joe are on a 300 m long 405 n scaffold supported by two cables attached to its ends bob
you are the science officer on a visit to a distant solar system prior to landing on a planet you measure its diameter
a u-shaped tube is partly filled with water and partly filled with a liquid that does not mix with water both sides of
a hole is drilled straight through the center of the planet foosbane the planet is remarkable in that its density is
in one of my demonstrations i let someone break concrete blocks that are placed on top of me while i am sandwiched
a duck flying horizontally due north at 142 ms passes over atlanta where the magnetic field of the earth is
a 20 kg object moving with a velocity of 80 ms collides with a 80 kg object that is initially at rest after the
a 2 kg mass is held at rest on top of a frictionless and horizontal table a light string loops over a pulley which is
a stone of weight w has specific gravity 251a when the stone is suspended from a scale and submerged in water what is
a 07 kg mass is moving in a circle of radius 15 m on a flat frictionless table at the end of a string the speed of the
a small marble is dropped from a height of 12 m and comes to rest after penetrating 23 cm into sand a determine the
a particle accelerates uniformly from rest to a speed of 50ms in 10 sec it then continues its motion at a constant
a student sits at rest on a piano stool that can rotate without friction the moment of inertia of the student-stool
the drill bit of a variable-speed electric drill has a constant angular acceleration of 521 rads2 the initial angular
the water supply of a building is fed through a main pipe 600 cm in diameter a 300 cm diameter faucet tap located 100 m
a horizontal pipe 10 cm in diameter has a smooth reduction to a pipe 5 cm in diameter if the pressure of the water in
a a water hose 400 cm in diameter is used to fill a 250 l bucket if it takes 300 min to fill the bucket what is the
a 140 kg block of metal measuring 120 cm x 100 cm x 100 cm is suspended from a scale and immersed in water the 120 cm
hoover dam was built in the 1930s to provide electricity for the southwest us and to prevent the wild colorado river
a bluetooth headset has an intensity of 008 wm2 at 5 cm distance if you carry your phone on your belt 75 cm from the
a turn on a racetrack has a radius of curvature of 2000 ft and a bank angle theta if cars travel at 140 mph through the
a tetherball apparatus consists of a ball attached to a 210 m rope that is attached in turn to the top of a 250 m tall
a disk of radius 215 cm rotates about its axis points on the disks rim undergo tangential acceleration of magnitude 113
one lens of a nearsighted persons eyeglasses has a focal length of -217 cm and the lens is 170 cm from the eye if the