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a 700lbf prefabricated slab is being lifted up by a crane at a constant velocity the crane pulls on the slab with a
in table tennis a very light but hard ball is hit with a hard rubber or wooden paddle in tennis a much softer ball is
the half-life of a particular atom is 456 minutes determine the ratio of material left to the original amount aftera
a 280-kg ball moving to the right at a velocity of 230 ms on a frictionless table collides head-on with a stationary
in procedure 1 suppose the hanging mass is mh 285 g and the mass of the cart is mc 762 ga assume there is no friction
a 720-kg person pushes on a small doorknob with a force of 500 n perpendicular to the surface of the door the doorknob
a 7200kg boxcar traveling at 170ms strikes a second boxcar at rest the two stick together and move off with a speed of
a 767-cm object is placed 337 cm away from a convex mirror with a focal length of 151 cma what is the distance between
a 8-m long wire with a mass of 10 g is under tension a transverse wave for which the frequency is 450 hz the wavelength
at t 0 the current through a 430-mh inductor is 490ma and is increasing at the rate of 103mas what is the initial
in the system shown three masses are connected via string and a series of pulleys to one another find the acceleration
a system of four capacitors are connected across a 90 -v voltage source as shown in the figurea what is the charge on
a presbyopic farsighted eye has a near point of 100 cm away what type of lens is needed to permit the eye to see
to fit a patient for contact lenses an optometrist places an object of 130cm height 40cm from the patients cornea this
two long parallel wires carry currents of 4 a and 8 a in the opposite direction the wires are separated by 026 ma find
if a 90 mph 4023ms fastball with a mass of 0145kg is struck by a bat and they are in contact for 005s find the force
a system consists of a uniform electric field of 426 nc directed in the positive x direction together with a particle
a 900 v battery has been used to fully charge a 300 muf capacitor how many electrons must be moved from the negative
a system consisting of one positively charged particle and one negatively charged particle is altered by an outside
the switch is flipped to position a and enough time is allowed to pass so that the current reaches its maximum value
a 900mw helium neon laser emits a visible laser beam with a wavelength of 638nm how many photons are emitted per
a 90a current is charging a 070 -cm-diameter parallel-plate capacitora what is the magnetic field strength at a point
a 91-nm-thick cell membrane undergoes an action potential that follows the curve in figure 1 part a what is the
when the switch in the figure is closed the current takes 300 ms to reach 980 of its final value if r 1100 omega what