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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
a laserpointer has a beam intensity of 55 wm2 and a beam radius of 21 mm a first grader attempts to use it to move a