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brett uses a rope and pulley to lift a 75 kg sack 20 m onto a truck he pulls downward on the rope with a force of 25 x
a a 2500 n force moves a 1200 kg crate from rest to a final speed of 96 msnbspif the frictional force is 500 n what is
a copper cup with a mass of 1000 g contains 960 g of water both the cup and the water are at 130oc if 700 g of a
describenbspspecific heatnbspwater has a specific heat of 10 calgoc while that of copper is 009 calgocnbspwhat can you
use energy and work equations to answer this questiona 250 n force moves a 120 kg crate from rest to a final speed of
you insert a pipette of diameter 0700 mm into a liquid that is at 200c and has a mass density of 1261 kgm3part a if the
in an air duct running along the outside of a building air flowing through the duct has a mass density of 120 kgm3 and
you have constructed a raft that is 200 m long 200 m wide and 0100 m thickpart a if the mass of the raft is 200 kg and
sonic the hedgehog weighs 5kg and is falling from a height of 50 m onto a spring which will be compressed 1m before
a venturimeter is used for measuring flow of water along a pipe the diameter of the venturi throat is two fifths the
just for fun you try to throw a ball to your roommate who is directly above you standing at the window the ball thrown
a helicopter is traveling at 40nbspms at a constant altitude of 200nbspm over a level field if a wheel falls off the
hurricane emily was roaring towards landfall at the border of texas and northern mexico along the gulf which country do
what is the rate of turn rot and turn radius tr of an aircraft doing a level 3g turn at 108
a heat pump that operates on a carnot cycle cools a house in a very hot climate during the hottest part of the day the
the temperature of earths oceans at a depth of 2500 m is about 4 c suppose you want to use this water as the
a manufacturer sells three types of motorcycles-call them types a b and c -each available in yellow red glossy black or
determine the maximum allowable gage pressure inside the shown tank the tank wall thickness is 0375 inches the
astronomers find that light emitted by a particular element at one edge of the sun has a slightly higher frequency than
suppose that the hubble constant had a value ofnbsphnbspnbsp135nbspkmsmpcnbspwhat would be the age of the universe
a galaxy cluster has a recessional velocity of 36000 kms using the best estimate for hubbles constant find the distance
questionnbsp1 a ballon contains 46 l of nitrogen gas at a temperature of 730 k and a pressure of 150 kpa if the
a 16-kg projectile is fired from level ground the vertical component of the initial velocity is 44 ms and the
a 5 kg ball ball a traveling to the right at 4 ms collides with a 2 kg ball ball b at rest after the collision the 2 kg
a motor spins a disk idisknbsp 251 kgm2 with a torque of 40 nm and a 18 n frictional force acts on the disk at a radius