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a 100-coil spring has a spring constant of 380 nm it is cut intofour shorter springs each of which has 25 coils one end
the shock absorbers in the suspension system of a car are in suchbad shape that they have no effect on the behavior of
the front and rear sprockets on abicycle have radii of 900 cm and 510 cm respectively theangular speed of the front
a 30 kg block slides down a plane inclined200 to the horizontal with a coefficent of kinetic frictionbetween the block
raw sewage is raised vertically by 549m in the amountof 189106 liters each day if the average density ofthe sewage is
three identical masses of 620 each are placed on the x axis one mass is at -130 one is at the origin and one is at
the sun has a mass of 199 x 1030 kg and is moving in a circularorbit about the center of our galaxy the milky way
a 90 kg cylinder rolls withoutslipping on a rough surface at an instant when its center ofgravity has a speed of 80
a 40kg block is suspended from a spring with force constant of500nm a 50g bullet is fired into the block from directly
in a hypothetical nuclear fusion reactor the fuel is deuterium gas at a temperature of about 91 x 108 k if this gas
a cylindrical fishing reel has a moment of inertia of i 630e-4 kgm2 and a radius of 386 cm a friction clutchin the reel
a styrofoam cup holding 90 g of hot water at 95degc cools to room temperature 230degc what is the change in entropy of
the alarm at a fire station rings and a 79-kg fireman starting from rest slides down a pole to the floor below a
a guitar string is 91 cm long andhas a mass of 36 g the distance from the bridge to the supportpost is l 60 cm and the
a parallel-plate vacuum capacitor with its plates separated by a distance of x1 has an amount of energy equal to u
a 200 mw laser pulse is focused with a lens to a diameter of20muma what is the laser beams electric field amplitude at
a carnot engine operates between a hot reservoir at 310 k and a cold reservoir at 280 k if it absorbs 500 j of heat at
an object of mass m200 kg is attached to a spring which is vibrating on a horizontell frictionless table the spring has
a 10kg block is set moving with an initial speed of 6 ms on arough horizontal surface if the force of friction is
a 10-cm-diameter disk emits light uniformly from its surface 20 cm from this disk along its axis is an 90-cm-diameter
a small postage stamp is placed in front of a concavemirror radius 84m such that the image distanceequals the object
it is determined by immersing a crown in water that its volumeis 26 in3 00015 ft3a what would its weight be if it were
a crate of mass m 30 kg is placed at rest on a frictionless inclined plane which has an angle 60o above horizontala
a certain part of aircraft engine has a volume of 13ft3a find the weight of the piece when it is made of ironb if the
a small statue is recovered in an archaeological dig itsweight is measured to be 96 lb and its volume 008ft3a what is