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a spring k 400 nm is hung verticallya if a 5 kg mass is attached to the end of the spring and gently lowered to rest
1 what is the role of natural cycles and what part do we play in your ecosystem discuss three natural cycles and their
a person who is properly constrained by an over-the-shoulder seat belt has a good chance of surviving a car collision
freeway traffic according to a scientific american article may 1990 current freeways can sustain about n vehicles per
you have a pail of water that weighs exactly 40 pounds you place a live 3-pound trout into the pail of water and no
multiple choice1 an ideal source of emf is connected in seriew with a resistor in closed loop and a current or 0e50 a
imagine in a remote area of the countryside a 70-kv 60-hz power line a shifty local resident has erected a large open
a large yacht has a mass of 305 tonnes the yacht sinks and is lying on the sea bed at a depth of 40m it is estimated
a 75 x 104 w motor that is 75 efficient exerts an average force of 35 x 103 n to move a boat at a constant speed how
an electricity generating station has a rated output of 300 megawatts given that the station heat rate is 12 000kjkw-h
1 birds resting on high-voltage power lines are a common sight the copper wire on which a bird stands is 22cm in
the explosion of the firecracker in the air at a height of 40m produces a 100 db sound level at the ground below if the
1 a 1500kg automobile starts from rest on a horizontal road and gains speed of 72kmh in 30 sa what is the average power
1 the speed of a 40kg object is given by 2t ms where t is in seconds at what rate is the resultant force on this object
scott riding for the mercury team won the 2002 mt rushmore hill climb bicycle race with a winning time of 1 hour 50
1 you are told that the volume of a sphere is given by v pie d4 where v is the volume and d is the diameter of the
a block with mass m has a coefficient of kinetic friction mk with the floor if the block is obeying newtons 1st law
1 what is the gravitational potential energy relative to the ground of a 10-kg box at the top of a 50-m building2 a
sam whose mass is 75 kg takes off across level snow on his jet-powered skis the skis have a thrust of 200 n and a
1 what is the electric field strength e at a point 0400 m from a point of charge of 175 microca 200 x 105 ncb 985 x
the heating element of an electric broiler dissipates 28 kw of power when connected to a potential difference of 120 va
strontium-90 is to be used in a radioisotopic thermoelectric generator rtg for powering a navigation beacon located in
a turboprop producing 1000 kw drives a propeller operating at 85 propulsive efficiency if the fuel flow to the engine
if points a and b in the figure below are connected to a 10 v battery what is the power dissipated in each of the
what is the power of a sound wave b 32 db passing through an area of 125 cm 2 suppose the same sound wave passes