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A spherical shell with radius R and uniform charge density "sigma" is sandwiched between two infinite sheets with surface charge density negative "sigma" and "sigma". If the potential to the far right at x= negative infinity is taken to be zero, what is the potential at the center of the sphere and at x = negative infinity?
a 10-m uniform beam of weight 100 n is supported by two ropes atthe ends. if a 400-n person sits at 2.0 m from the left
A spring with a constant k of 30 N/m is stretched a distance of 20 cm (0.20m) from its original unstretched position
A rectangular block of ice 9.00m on each side and 1.6 m thick floats in sea water. The density of the sea water is 1025 kg/m3. The density of ice is 917 kg/m3.
Oxygen gas having a volume of 1050 cm3 at 35.0°C and 1.01 105 Paexpands until its volume is 1550cm3 and its pressure is 1.06 105 Pa. Find the number of moles of oxygen present
consider two parallel-plate capacitors c1 and c2 that are connected in parallel. the capacitors are identical except
A set of jumpers cables used to start a car from another car's batterty is connected to the terminals of both batteries. What is the force per unit length on the cables
The magnitude of the force of friction acting on the block between A and is 1.2N and points A and B are 0.5 m apart. If the kinectic energies of the block at A and B are 4J and 5.6 J, respectively, how much work is done on the block by the force p..
a uniform 2000 kg beam 10 m long supports a 500 kg weight 3 m for the right support. calculate the forces in each of the vertical support columns
A rope attached to a 20.0kg wood sled pulls the sled up a 20.0? snow-covered hill. at what value of the tension does the box slip
A penny is in an external electric field of magnitude 1.7 kN/C directed perpendicular to its faces. Find the charge density on each face of the penny
A 20.0kg light signal hangs from the end of a 7.0m uniform density pole of mass 12.0kg. The pole is free to swivel from the hinge at point A, What is the reaction force (magnitude and direction) at the hinge
A hammer taps on the end of a 4.00-m-long metal bar at room temperature. What is the speed of sound in this metal
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