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Four identical charges (+2.9 μC each) are brought from infinity and fixed to a straight line. Each charge is 0.33 m from the next. Determine the electric potential energy of this group.
A proton moves at a speed of 1210 m/sin a direction perpendicular to a magnetic field with a magnitude of 0.74 T. What is the magnitude of the magnetic force on the proton?
a 1.5 kg ball and a 2.2 kg ball are connected by a 1.0 m long rigid massless rod. the rod is rotating cw about its
A piece of wood is 6.00 m long, 0.260 m wide and 0.060 m thick. Its density is 600kg/m cubed. What volume of iron ( P iron = 7.8 x 10 cubed kg/m cubed) must be fastened underneath the wood to sink it so that the top surface of the wood is just even w..
Two blocks are pressed together, compressing a spring, the system is then released from rest on a level, frictionless surface. the spring is not attacthed to either block and drops to the surface after it is expanded. i need to demonstrate whether..
The planet Neptune orbits our Sun at an average distance of 4.50 * 10^9 km.It's mass is 1.02 8 10^26 kg. The Sun's mass is 1.99 * 10^30 kg. What is the strength of the gravitational field at the "surface"of Neptune
A cable is lifting a construction worker and a crate, as the drawing shows. What is the tension in the cable above the worker
A 15.1 mass fastened to the end of a steel wire with an unstretched length of 0.650 is whirled in a vertical circle with angular velocity 2.00 at the bottom of the circle. The cross-sectional area of the wire is 1.20×10?2 . Calculate the elongatio..
A salesperson claims a 1340 kg car has an average acceleration of 3 m/s2 from a standing start to 100 km/h. What average net force is required to do this
If the x position of a particle is measured with an uncertainty of 1.00×10-10 m, then what is the uncertainty of the momentum in this direction
A man pushes an 80.0 N crate a distance of 5.00 m upward along a frictionless slope that makes an angle of 30o with the horizontal. how much work is done by the man
in the engr 10 lab e391 there are 75 long light bulbs p100 w and 6 regular bulbs p60 w. how much energy is consumed
a double-slit experiment is performed with light of wavelength 600 nm. the bright interference fringes are spaced 1.54
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