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the end of the cutting cord on a gas-powered weed cutter is 015 m in length if the motor rotates at the rate of 20
a transformer for an answering machine takes an acvoltage of amplitude 150 v as its inputand supplies a 79 v amplitude
a projectile is shot from the surface of earth by means of a very powerful cannon if the projectile reaches a height of
a particle of mass m is confined to move without friction in a vertical plane with axes x horizontal and y vertically
an electrically charged point particle that has a mass of 15x 10-6 kg is launched into a uniform electric field with
a cylindrical container open at the top is 10 m tall and contains mercury to a certain depth d the rest of the cylinder
squaw valley ski area in california claims that its lifts can move49600 people per hour if the average liftcarries
an vehicles starts from rest and accelerates at a rateof 2ms2 in a straight line until it reaches a speed of20ms the
a billiard ball is moving in the x-direction at 300 cms and strikes another billiard ball moving in the y-direction at
a research group plans to construct an engine that extracts energyfrom the ocean using the fact that the water
a nuclear power plant has a reactor thatproduces heat at the rate of 950 mw this heat is used to produce230 mw of
a motorcycle and a police car are moving toward one another thepolice car emits sound with a frequency of 522 hz and
you are an astronaut and you observe a small planet to be spherical after landing on the planet you set off walk
captain kirk and crew land on a planet that is made ofintergalactic bird feathers the radius of the planet is twice
a satellite is in a circular orbit just above the surface of themoon the radius of the moon is 1738 km what is the
a hollow cylinder of mass 0100kg and radius 400cm has a stringwrapped several times around itif the string is attached
a rock is thrown vertically upward from ground level at time t0 at t15s it passes the top of a tall tower and 10s later
two people start at the same place and walk around a circular lakein opposite directions one walks with an angular
consider a balloon containing hydrogenmolecules at room temperature 20degc and atmospheric pressureif the balloon has a
a meter stick is freely pivoted about the 20cm mark find the frequency of the small amplitude
a 500-n person stands on a uniform board of weight 100 n and length80 m the board is supported at each end if the
a 10-m uniform beam of weight 100 n is supported by two ropes atthe ends if a 400-n person sits at 20 m from the left
a lever is 50 m long the distance from the fulcrum to the weightto be lifted is 10 m if a 3000 n rock is to be lifted
a lever is 50 m long the distance from the fulcrum to the weightto be lifted is 10 m if a worker pushes on the opposite
two equal-sized buckets are filled to the brim with water but oneof them has a piece of wood floating in itwhich bucket