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two carts are held together by a mass less spring and are travelingtogether to the right on a frictionless air track at
a 11508 g ice cube at -15degc is placed in an aluminum cup whoseinitial temperature is 74degc the system comes to an
when the earth moon and sun form a right triangle with the moonlocated at the right angle as shown in the figure the
a wooden pole is 400m long weighs 315 n and has its centerof gravity 150m from one end what force is needed to lift
one possible concern with mri is turning the magnetic field on or off too quickly bodily fluids are conductors and a
an old covered bridge across a country stream weighs 89200n a large truck stalls 4m from one end of the 900-m bridge
16 rm g of liquid water is placed ina flexible bag the air is excluded and the bag is sealedit is then placed in a
a lead ball is dropped from a height of 50m above a lake it hits the water with its final free fall velocity and
two trains one traveling at 72kmh and the other at 144kmh are headed toward each other on straight level track when
a small loop of wire of radius 19 cm is placed at the center of a wire loop with radius20 cm the planes of the loops
a laser of average power 24 mwemits a cylindrical beam of light which is 24 mm in diametera if it shines on a perfectly
a car mass 1080 kg is traveling at 258 ms when it collideshead-on with a sport utility vehicle mass 2010 kg traveling
after filtering through the atmosphere the suns radiationilluminates earths surface with an average intensity of 10kwm2
an x-ray machine uses 260 kv rms at800 ma rms when it is operating the power source is a 420 v rms linea what must be
in the computer-based experiment concerning rotational motion the acceleration of a point on the rim of the large steel
two-dimensional collisions may be studied by using an air table similar to an air hockey game instead of the method we
a uniform 14-kg rod that is 077 m long is suspended at rest from the ceiling by two springs one at each end both
a cannon of mass 614 x 103 kg is rigidly bolted to theearth so it can recoil only by a negligible amount the
1 the force between two parallel wires carrying currents in thesame direction isa repulsive because the electrons in
the sound intensity is 00112 wm2 at a distance of18 m from an isotropic point source of sounda what is the power of the
two people start at the same place and walk around a circular lakein opposite directions one walks with an angular
assuming the lower leg and foot together have a combined mass of 4kg and the center of mass is located at the center of
a 150-n sled is pulled up a 28 degree slope at a constant speed by a force of 100n what is the coefficient of kinetic
as you stand by the side of the road a car approaches you at aconstant speed sounding its horn and you hear a frequency