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John's mass is 86 kg, and Barbara's is 55 kg. He is standing on the x axis at xJ = +9.0 m, while she is standing on the x axis at xB = +2.0 m. They switch positions. How far and in which direction does their center of mass move as a result of the switch?
Fluid flows in a horizontal channel that measures 1 · 40 cm. If Re ¼ 1500, calculate the flow rate and the pressure drop over a length of 10 m if the fluid is water at 20-C,
a block of mass m1=8 rests on a frictionless surface and is attached to a light cord that is wrapped around a solid cylinder of mass m2, radius r=.130 m and moment of inertia I=1/2m2R^2.
An electic dipole has charges of +or- 4.10pC that are separated by 6.25cm. Determine the net force on the dipole
The 20-g centrifuge at NASA's Ames Research Center in Mountain View, California, is a horizontal, cylindrical tube 58 ft long. Suppose an astronaut in training sits in a seat at one end, facing the axis of rotation 29.0 ft away. Decide the rotation r..
when a parachute opens the air exerts a large drag force on it. this upward force is initially greater than the weight
A person 1.6 m tall stands 2.9 m from a reflecting globe in a garden. (a) If the diameter of the globe is 33 cm, where is the image of the person, relative to the surface of the globe?
A 63.1 kilogram skier coasts up a snow-covered hill that makes an angle of 26.4 degree with the horizontal. Obtain the magnitude of the kinetic frictional force
a 7900 kg car accelerates from rest at the top of a drivewaythat is sloped at an angle of 16.7 degrees with the horizontal. what is the length of the driveway
A 5.0V potential difference is applied between the ends of a 0.80mm -diameter, 90cm -long nichrome wire, What is the current in the wire
A series L-R-C circuit consisting of a voltage source, a capacitor of capacitance C, an inductor of inductance L, and a resistor of resistance R is driven with an AC voltage. Find the ratio of output voltage or input voltage.
A current loop, carrying a current of 4.0 A, is in the shape of a right triangle with sides 30, 40, and 50 cm. Find the magnitude of the magnetic dipole moment of the loop
the 2.0 cm diameter coil has 25 turns and has a current flowing through it of 5 A. The magnetic field strength is .4 T. What is the emf due to the change in flux
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