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Show that Electric field E = Jρ using ohms law.
ρ is the electric resistivity of the conductor
J is Current density using ohms law.
A 55-kg mass ice skater standing stationary on very slipper ice (negligible friction) throws a 0.45 kg baseball with a speed of 27 m/s in the horizonatal direction
Write Kirchhoff's laws for a circuit made of three known resistors in series; prove the equation for combining resistors in series
A 0.283-m-thick sheet of ice covers a lake. The air temperature at the ice surface is -17.7 °C. calculate the number of millimeters by which the ice thickens
an electric transformer is in a cylinderical tank 60cm in diameter and 1 meter high, with a flat top and bottom. how many degrees will the tanks surface rise above room temperature
For the polarizers in the figure, suppose the incident light is linearly polarized, What is the angle (in degrees) the initial direction of polarization makes with the first polarizer
Helium-neon laser light (λ = 632.8 nm) is sent during a 0.290 mm wide single slit. What is the width of the central maximum on a screen 2.00 m from the slit? A screen is placed 48.0 cm from a single slit, which is illuminated by light of wavelength 6..
A flat circle of radius 17 cm is placed in a uniform electric field of magnitude 6.2 102 N/C. What is the electric flux through the circle when its face is perpendicular to the field lines
With an average mass of only 30.0 g, the ouse lemur of Madagascar is the smallest primate on the earth. What is the lemur's tangential speed at that point
Calculate the boy's speed when he hits the water. How much time is required for the boy to reach the water? How far horizontally will the boy travel before he hits the water?
a 4.0-kg hanging mass is connected by a string over a pulley to a 8.0-kg block ona frictionless ramp with an angle of inclination of 40 degrees above the horizontal
A superhero flies 272m from the top of a tall building at an angle of 32 below the horizontal. What is the vertical component of the superhero's displacement.
An electron enters a uniform magnet field having a flux density 200uT at a speed of 2x10 6 ms-1 perpendicular to the field. Determine the radius of its orbit, then find the required electric field strength, applied perpendicular to the magnetic f..
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