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Two charged objects experience a mutual repulsive force of 0.86N. If the charge of one of the objects is reduced by half and the distance separating the objects istripled, what is the new force? (Enter the magnitude of the force.)
You place a 3.63-mm-high diamond on the axis of and 12.7 cm from a lens with focal length -5.15 cm. How high is the image
a small ball is thrown with a speed of 15 m/s downward from the top of a 50 meter tall building. determine the ball's velocity at the midpoint of its motion
A postal worker pushes a 160 N bag of mail up a 31 degree ramp at a constant velocity. The ramp exerts a frictional force of 30 N on the bag. What is the magnitude of the worker's push
Given that hbar = 1.055*10^-34 J*s, find the wavelength in nm of light emitted from a hydrogen atom when its electron moves from the n=6 state to the n=2 state. What is the minimum uncertainty in the momentum of the electron
A car moving at 20.0 m/s decelerates at 7.00 m/s2. How far will it travel before stopping
A steel safe with mass 2200 kg falls onto concrete. Just before hitting the concrete its speed is 40 m/s, and it smashes without rebounding and ends up being 0.06 m shorter than before. What is an approximate magnitude of the force exerted on the ..
You throw a 13 g rock and it leaves your hand at a speed of 17 m/s. What is the de Broglie wavelength of this rock
A doubly charged helium atom whose mass is 6.6 10 to 27 kg is accelerated by a voltage of 2200 V. What will be its radius of curvature if it moves in the plane perpendicular to a uniform 0.308 T field?
A small button placed on a horizontal rotating platform with diameter 0.310m will revolve with the platform, How far from the axis can the button be placed, without slipping, if the platform rotates at 59.0rev/min
A flat puck with mass M=.10kg is rotated in a circle with radius R=.20 m on a frictionless air-hockey tabletop at constant speed. then what is the weight G=mg of the dangling block
A tightrope walker is practicing. She is balanced on a rope at the exact midpoint of the rope. What angle with the horizontal does it make
A coin is placed on a turntable 13 cm from the center. A lump of clay placed behind the coin prevents it from sliding backwards , How long will it take before the coin begins to slide radially
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