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An in?nitely long wire carries a current I along the x-axis, and is bent so as to have a semi-circular detour around the origin, with radius R. Determine B at the origin.
Find the average magnitude of the Poynting vector 4.00 cm from the antenna, at the location of a typical person's head. Assume that the antenna emits energy with cylindrical wave fronts.
A parallel-plate capacitor has circular plates of 10.4 cm radius and 1.67 mm separation. Calculate the capacitance in picofarads
A husband and wife take turns pulling their child in a wagon along a horizontal sidewalk. Each exerts a constant force and pulls the wagon through the same displacement. They do the same amount of work, but the husband's pulling force is directed ..
an object is thrown upward to a person of a roof . at what point is the objects kinetic energy at its max? at what point is the potential energy of the system at a max
A projectile is launched from a 300 m high cliff at an angle of 30? with an initial velocity of 150 m/s. (g=9.8m/s2). calculate the Direction of the velocity on impact
Avogadro's number of water molecules has a mass of 18 gram. If we were somehow able to move an electron from one out of every 109 molecules in a gram of water, what would be its charge
Qualitatively sketch the inversion charge density in the channel region when the tran-sistor is biased in the non salutation region. Repeat for the case when the transistor is biased in the saturation region.
What is the relation between your answers to parts (b) and (c)? Explain why the rule of thumb works. (e) Are the predictions made by the rule of thumb too large or too small? Why?
A disk of mass M and radius R rotates around the z axis with angular velocity wI. What is the ratio of the initial to the final kinetic energies of the two-disk system
A 65 g bullet traveling at 290 m/s penetrates a block of ice at 0°C and comesto rest within the ice. how much ice is melted as a result of the collision
A spinning disk (i.e., a rotating disk) has a radius of 6 cm (6 centimeters) and a constant rate of rotation of 7200 rpm (7200 revolutions per minute). Find the total distance traversed in 5 seconds by a particle of dust that lies at a point on th..
The floor of the basement of a house is 2.5m below ground level, and the floor of the attic is 4.4m above ground level. What are the respective potential energies of 2.8kg objects in the basement and attic, relative to ground level? Express the answe..
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